Smartwatch Comparison Before You Pick a Platform

This smartwatch comparison puts every current smartwatch on Amazon.com side by side, starting with the question most tables skip: which phone it works with. Compare smartwatches from Apple, Samsung, Google, Garmin, Amazfit, COROS, Polar and others by compatibility, real battery life with the screen always on, sensors and GPS, plus today's price and its 30-day movement. Bands, cases and chargers sold alone are left out.

Which smartwatch fits your phone?

Which phone do you use? What is it mainly for? What is your budget?

146 of 146 products · View ↓

Prices updated on October 14, 2026 · Affiliate links

ⓘ Details · ☐ Compare · ☆ Favourites and price-change alerts when you come back

Model	Brand	Battery with AOD ↑?	Works with iPhone?	Works with Android?	Full features require?	Case size?	Display type?	Always-on display?	Battery quoted?	Charging time?	GPS?	Heart rate?	SpO2?	ECG?	Skin temperature?	Sleep tracking?	Blood pressure (estimated)?	Water resistance?	Cellular (LTE)?	NFC payments?	Speaker and mic?	Storage?	Weight?	In stock?	Amazon rank?	Reviews?	Price?	Bought last month?
Apple Watch SE 3 40mm	Apple	0.8 days	Yes	No	iPhone	40 mm	LTPO OLED	Yes	0.8 days	—	Single band	Yes	No	No	Yes	Stages (estimated)	No	WR50	No	Yes	Speaker and mic	64.0 GB	26 g	—	—	4,600	$199.99	10,000+
Apple Watch SE 3 44mm	Apple	0.8 days	Yes	No	iPhone	44 mm	LTPO OLED	Yes	0.8 days	—	Single band	Yes	No	No	Yes	Stages (estimated)	No	WR50	No	Yes	Speaker and mic	64.0 GB	33 g	Yes	—	4,600	$249.00	7,000+
Apple Watch SE 3 40mm	Apple	0.8 days	Yes	No	iPhone	40 mm	LTPO OLED	Yes	0.8 days	—	Single band	Yes	No	No	Yes	Stages (estimated)	No	WR50	Yes	Yes	Speaker and mic	64.0 GB	26 g	Yes	—	573	$269.00	3,000+
Apple Watch Series 9 45mm	Apple	0.8 days	Yes	No	iPhone	45 mm	LTPO OLED	Yes	0.8 days	—	Single band	Yes	Yes	FDA cleared	Yes	Stages (estimated)	Yes	WR50	Yes	Yes	Speaker and mic	64.0 GB	39 g	Yes	—	199	$637.00	—
Apple Watch Series 12 42mm	Apple	1.0 days	Yes	No	iPhone	42 mm	LTPO OLED	Yes	1.0 days	—	Single band	Yes	Yes	FDA cleared	Yes	Stages (estimated)	Yes	WR50	No	Yes	Speaker and mic	64.0 GB	32 g	—	—	164	$389.99	10,000+
Apple Watch Series 12 46mm	Apple	1.0 days	Yes	No	iPhone	46 mm	LTPO OLED	Yes	1.0 days	—	Single band	Yes	Yes	FDA cleared	Yes	Stages (estimated)	Yes	WR50	No	Yes	Speaker and mic	64.0 GB	40 g	Yes	—	165	$439.99	4,000+
Apple Watch Series 11 46mm	Apple	1.0 days	Yes	No	iPhone	46 mm	LTPO OLED	Yes	1.0 days	—	Single band	Yes	Yes	FDA cleared	Yes	Stages (estimated)	Yes	WR50	Yes	Yes	Speaker and mic	64.0 GB	38 g	Yes	—	1,600	$699.00	—
Apple Watch Series 12 46mm	Apple	1.0 days	Yes	No	iPhone	46 mm	LTPO OLED	Yes	1.0 days	—	Single band	Yes	Yes	FDA cleared	Yes	Stages (estimated)	Yes	WR50	Yes	Yes	Speaker and mic	64.0 GB	40 g	Yes	—	30	$539.99	500+
Apple Watch Series 12 42mm	Apple	1.0 days	Yes	No	iPhone	42 mm	LTPO OLED	Yes	1.0 days	—	Single band	Yes	Yes	FDA cleared	Yes	Stages (estimated)	Yes	WR50	Yes	Yes	Speaker and mic	64.0 GB	32 g	Yes	—	30	$489.99	500+
Samsung Galaxy Watch 7 40mm	Samsung	1.2 days	No	Yes	Samsung Galaxy phone	40 mm	AMOLED	Yes	1.7 days	—	Dual band	Yes	Yes	FDA cleared	Yes	Stages (estimated)	Yes	5 ATM	No	Yes	Speaker and mic	32.0 GB	29 g	—	—	7,900	$234.99	2,000+
Samsung Galaxy Watch 8 40mm	Samsung	1.2 days	No	Yes	Samsung Galaxy phone	40 mm	AMOLED	Yes	1.7 days	—	Dual band	Yes	Yes	FDA cleared	Yes	Stages (estimated)	Yes	5 ATM	No	Yes	Speaker and mic	32.0 GB	30 g	Yes	#13	2,000	$298.00	2,000+
Samsung Galaxy Watch 8 44mm	Samsung	1.2 days	No	Yes	Samsung Galaxy phone	44 mm	AMOLED	Yes	1.7 days	—	Dual band	Yes	Yes	FDA cleared	Yes	Stages (estimated)	Yes	5 ATM	No	Yes	Speaker and mic	32.0 GB	34 g	Yes	#13	2,000	$309.00	500+
Google Pixel Watch 5 41mm	Google	1.2 days	No	Yes	Android phone	41 mm	AMOLED	Yes	1.2 days	45 min	Dual band	Yes	Yes	FDA cleared	Yes	Stages (estimated)	No	5 ATM	No	Yes	Speaker and mic	64.0 GB	31 g	Yes	#24	138	$399.99	500+
Samsung Galaxy Watch 7 44mm	Samsung	1.2 days	No	Yes	Samsung Galaxy phone	44 mm	AMOLED	Yes	1.7 days	—	Dual band	Yes	Yes	FDA cleared	Yes	Stages (estimated)	Yes	5 ATM	No	Yes	Speaker and mic	32.0 GB	34 g	Yes	—	329	$149.96	100+
Samsung Galaxy Watch 9 44mm	Samsung	1.2 days	No	Yes	Samsung Galaxy phone	44 mm	AMOLED	Yes	1.2 days	90 min	Dual band	Yes	Yes	FDA cleared	Yes	Stages (estimated)	Yes	5 ATM	Yes	Yes	—	32.0 GB	34 g	Yes	#29	71	$459.99	100+
Samsung Galaxy Watch 8 Classic 46mm	Samsung	1.2 days	No	Yes	Samsung Galaxy phone	46 mm	AMOLED	Yes	1.7 days	—	Dual band	Yes	Yes	FDA cleared	Yes	Stages (estimated)	Yes	5 ATM	No	Yes	Speaker and mic	64.0 GB	64 g	Yes	#13	941	$474.05	1,000+
Samsung Galaxy Watch 9 40mm	Samsung	1.2 days	No	Yes	Samsung Galaxy phone	40 mm	AMOLED	Yes	1.2 days	80 min	Dual band	Yes	Yes	FDA cleared	Yes	Stages (estimated)	Yes	5 ATM	No	Yes	—	32.0 GB	32 g	Yes	#29	245	$379.99	1,000+
Samsung Galaxy Watch 9 44mm	Samsung	1.2 days	No	Yes	Samsung Galaxy phone	44 mm	AMOLED	Yes	1.2 days	90 min	Dual band	Yes	Yes	FDA cleared	Yes	Stages (estimated)	Yes	5 ATM	No	Yes	—	32.0 GB	34 g	Yes	#2,562	—	$349.53	—
Samsung Galaxy Watch 7 40mm	Samsung	1.2 days	No	Yes	Samsung Galaxy phone	40 mm	AMOLED	Yes	1.7 days	—	Dual band	Yes	Yes	FDA cleared	Yes	Stages (estimated)	Yes	5 ATM	Yes	Yes	Speaker and mic	32.0 GB	29 g	Yes	#7	834	$219.99	100+
Samsung Galaxy Watch 9 40mm	Samsung	1.2 days	No	Yes	Samsung Galaxy phone	40 mm	AMOLED	Yes	1.2 days	80 min	Dual band	Yes	Yes	FDA cleared	Yes	Stages (estimated)	Yes	5 ATM	Yes	Yes	—	32.0 GB	32 g	Yes	#29	71	$429.99	100+
Samsung Galaxy Watch 7 44mm	Samsung	1.2 days	No	Yes	Samsung Galaxy phone	44 mm	AMOLED	Yes	1.7 days	—	Dual band	Yes	Yes	FDA cleared	Yes	Stages (estimated)	Yes	5 ATM	Yes	Yes	Speaker and mic	32.0 GB	34 g	Yes	#7	834	$220.00	100+
Samsung Galaxy Watch 6 Classic 43mm	Samsung	1.2 days	No	Yes	Samsung Galaxy phone	43 mm	AMOLED	Yes	1.7 days	—	Single band	Yes	Yes	FDA cleared	Yes	Stages (estimated)	Yes	5 ATM	No	Yes	Speaker and mic	16.0 GB	52 g	Yes	#267	1,800	$224.99	50+
Samsung Galaxy Watch 5 44mm	Samsung	1.2 days	No	Yes	Samsung Galaxy phone	44 mm	AMOLED	Yes	1.7 days	—	Single band	Yes	Yes	FDA cleared	Yes	Stages (estimated)	Yes	5 ATM	Yes	Yes	Speaker and mic	16.0 GB	34 g	Yes	#1,192	83	$186.99	50+
Google Pixel Watch 5 41mm	Google	1.2 days	No	Yes	Android phone	41 mm	AMOLED	Yes	1.2 days	45 min	Dual band	Yes	Yes	FDA cleared	Yes	Stages (estimated)	No	5 ATM	Yes	Yes	Speaker and mic	64.0 GB	31 g	Yes	#24	43	$499.99	50+
Apple Watch Ultra 2	Apple	1.5 days	Yes	No	iPhone	49 mm	LTPO OLED	Yes	1.5 days	—	Dual band	Yes	Yes	FDA cleared	Yes	Stages (estimated)	Yes	WR100	Yes	Yes	Speaker and mic	64.0 GB	61 g	Yes	—	29	$764.00	—
Polar Ignite 3	Polar	1.5 days	Yes	Yes	Any phone	43 mm	AMOLED	Yes	8.0 days	—	Dual band	Yes	No	No	Yes	Stages (estimated)	No	WR30	No	No	None	0.0 GB	21 g	Yes	#1,506	812	$390.00	—
Google Pixel Watch 5 45mm	Google	1.7 days	No	Yes	Android phone	45 mm	AMOLED	Yes	1.7 days	60 min	Dual band	Yes	Yes	FDA cleared	Yes	Stages (estimated)	No	5 ATM	No	Yes	Speaker and mic	64.0 GB	37 g	Yes	#24	139	$429.99	200+
Google Pixel Watch 5 45mm	Google	1.7 days	No	Yes	Android phone	45 mm	AMOLED	Yes	1.7 days	60 min	Dual band	Yes	Yes	FDA cleared	Yes	Stages (estimated)	No	5 ATM	Yes	Yes	Speaker and mic	64.0 GB	37 g	Yes	#24	43	$529.99	200+
OnePlus OnePlus Watch 2	OnePlus	2.0 days	No	Yes	Android phone	47 mm	AMOLED	Yes	4.2 days	60 min	Dual band	Yes	—	No	No	Stages (estimated)	No	5 ATM	No	Yes	Speaker and mic	32.0 GB	49 g	Yes	—	537	$229.00	—
Garmin Venu X1	Garmin	2.0 days	Yes	Yes	Android phone	46 mm	AMOLED	Yes	8.0 days	—	Single band	Yes	Yes	No	Yes	Stages (estimated)	No	5 ATM	No	Yes	Speaker and mic	32.0 GB	34 g	Yes	#422	214	$699.99	—
Apple Watch Ultra 4	Apple	2.1 days	Yes	No	iPhone	49 mm	LTPO OLED	Yes	2.1 days	—	Dual band	Yes	Yes	FDA cleared	Yes	Stages (estimated)	Yes	WR100	Yes	Yes	Speaker and mic	64.0 GB	63 g	Yes	—	73	$774.00	1,000+
Samsung Galaxy Watch Ultra 47mm	Samsung	2.5 days	No	Yes	Samsung Galaxy phone	47 mm	AMOLED	Yes	3.3 days	—	Dual band	Yes	Yes	FDA cleared	Yes	Stages (estimated)	Yes	10 ATM	Yes	Yes	Speaker and mic	32.0 GB	61 g	Yes	#2,778	1	$289.99	—
Samsung Galaxy Watch Ultra 2	Samsung	2.5 days	No	Yes	Samsung Galaxy phone	47 mm	AMOLED	Yes	3.3 days	90 min	Dual band	Yes	Yes	FDA cleared	Yes	Stages (estimated)	Yes	10 ATM	Yes	Yes	—	64.0 GB	62 g	Yes	#3,437	4	$544.99	—
Garmin Venu 4 41mm	Garmin	3.0 days	Yes	Yes	Android phone	41 mm	AMOLED	Yes	10.0 days	—	Dual band	Yes	Yes	FDA cleared	Yes	Stages (estimated)	No	5 ATM	No	Yes	Speaker and mic	8.0 GB	33 g	Yes	—	1,800	$549.99	500+
Suunto Run	Suunto	3.0 days	Yes	Yes	Any phone	46 mm	AMOLED	Yes	12.0 days	—	Dual band	Yes	Yes	No	No	Stages (estimated)	No	5 ATM	No	No	—	4.0 GB	36 g	Yes	#11	144	$179.00	50+
Garmin Forerunner 165	Garmin	4.0 days	Yes	Yes	Android phone	43 mm	AMOLED	Yes	11.0 days	—	Single band	Yes	Yes	No	No	Stages (estimated)	No	5 ATM	No	Yes	None	4.0 GB	39 g	—	—	5,100	$198.95	7,000+
Garmin Venu 4 45mm	Garmin	4.0 days	Yes	Yes	Android phone	45 mm	AMOLED	Yes	12.0 days	—	Dual band	Yes	Yes	FDA cleared	Yes	Stages (estimated)	No	5 ATM	No	Yes	Speaker and mic	8.0 GB	38 g	Yes	#147	1,800	$549.00	500+
Amazfit Active 3 Premium	Amazfit	4.0 days	Yes	Yes	Android phone	45 mm	AMOLED	Yes	12.0 days	—	Single band	Yes	Yes	No	Yes	Stages (estimated)	No	5 ATM	No	No	Speaker and mic	—	38 g	Yes	#74	438	$166.99	—
Amazfit Active 2 Premium	Amazfit	4.0 days	Yes	Yes	Android phone	44 mm	AMOLED	Yes	10.0 days	120 min	Single band	Yes	Yes	No	Yes	Stages (estimated)	No	5 ATM	No	No	Speaker and mic	—	32 g	Yes	#85	1,600	$129.99	1,000+
Garmin Forerunner 170	Garmin	4.0 days	Yes	Yes	Android phone	43 mm	AMOLED	Yes	10.0 days	—	Single band	Yes	Yes	No	No	Stages (estimated)	No	5 ATM	No	Yes	None	4.0 GB	41 g	Yes	—	66	$338.30	300+
Garmin fēnix 8 AMOLED 43mm	Garmin	4.0 days	Yes	Yes	Android phone	43 mm	AMOLED	Yes	10.0 days	—	Dual band	Yes	Yes	FDA cleared	Yes	Stages (estimated)	No	10 ATM	No	Yes	Speaker and mic	32.0 GB	50 g	Yes	—	196	$999.99	200+
Garmin Forerunner 570 42mm	Garmin	4.5 days	Yes	Yes	Android phone	42 mm	AMOLED	Yes	10.0 days	—	Dual band	Yes	Yes	No	Yes	Stages (estimated)	No	5 ATM	No	Yes	Speaker and mic	8.0 GB	42 g	Yes	—	575	$549.99	100+
CMF CMF Watch Pro 2	CMF	4.5 days	Yes	Yes	Any phone	45 mm	AMOLED	Yes	11.0 days	100 min	Single band	Yes	Yes	No	No	Stages (estimated)	No	IP68	No	No	Speaker and mic	—	44 g	Yes	#245	1,800	$49.00	50+
Garmin vívoactive 5	Garmin	5.0 days	Yes	Yes	Android phone	42 mm	AMOLED	Yes	11.0 days	—	Single band	Yes	Yes	No	No	Stages (estimated)	No	5 ATM	No	Yes	None	4.0 GB	23 g	—	—	12,300	$191.00	8,000+
Garmin vívoactive 6	Garmin	5.0 days	Yes	Yes	Android phone	42 mm	AMOLED	Yes	11.0 days	—	Single band	Yes	Yes	No	No	Stages (estimated)	No	5 ATM	No	Yes	None	8.0 GB	23 g	Yes	#23	3,700	$299.00	2,000+
Garmin Venu 3S	Garmin	5.0 days	Yes	Yes	Android phone	41 mm	AMOLED	Yes	10.0 days	—	Single band	Yes	Yes	FDA cleared	Yes	Stages (estimated)	No	5 ATM	No	Yes	Speaker and mic	8.0 GB	27 g	Yes	#12	6,700	$449.99	—
Garmin Forerunner 265	Garmin	5.0 days	Yes	Yes	Android phone	46 mm	AMOLED	Yes	13.0 days	—	Dual band	Yes	Yes	No	No	Stages (estimated)	No	5 ATM	No	Yes	None	8.0 GB	47 g	Yes	#66	3,100	$449.99	400+
Garmin Forerunner 265S	Garmin	5.0 days	Yes	Yes	Android phone	42 mm	AMOLED	Yes	15.0 days	—	Dual band	Yes	Yes	No	No	Stages (estimated)	No	5 ATM	No	Yes	None	8.0 GB	39 g	Yes	#66	3,100	$449.99	500+
Garmin Forerunner 70	Garmin	5.0 days	Yes	Yes	Android phone	43 mm	AMOLED	Yes	13.0 days	—	Single band	Yes	Yes	No	No	Stages (estimated)	No	5 ATM	No	No	None	0.5 GB	40 g	Yes	—	160	$239.99	200+
Garmin Venu 3 45mm	Garmin	5.0 days	Yes	Yes	Android phone	45 mm	AMOLED	Yes	14.0 days	—	Single band	Yes	Yes	FDA cleared	Yes	Stages (estimated)	No	5 ATM	No	Yes	Speaker and mic	8.0 GB	30 g	Yes	#12	6,700	$449.99	200+
Garmin Instinct Crossover AMOLED	Garmin	5.0 days	Yes	Yes	Android phone	47 mm	AMOLED	Yes	14.0 days	—	Dual band	Yes	Yes	No	No	Stages (estimated)	No	10 ATM	No	Yes	None	4.0 GB	67 g	Yes	—	53	$649.99	—
Garmin Forerunner 570 47mm	Garmin	5.5 days	Yes	Yes	Android phone	47 mm	AMOLED	Yes	11.0 days	—	Dual band	Yes	Yes	No	Yes	Stages (estimated)	No	5 ATM	No	Yes	Speaker and mic	8.0 GB	50 g	Yes	—	575	$549.99	200+
Amazfit Bip 6	Amazfit	6.0 days	Yes	Yes	Android phone	46 mm	AMOLED	Yes	14.0 days	150 min	Single band	Yes	Yes	No	No	Stages (estimated)	No	5 ATM	No	No	Speaker and mic	—	28 g	—	—	7,200	$69.99	5,000+
Garmin epix Pro (Gen 2) 47mm	Garmin	6.0 days	Yes	Yes	Android phone	47 mm	AMOLED	Yes	16.0 days	—	Dual band	Yes	Yes	FDA cleared	Yes	Stages (estimated)	No	10 ATM	No	Yes	None	32.0 GB	55 g	Yes	#132	1,400	$581.49	500+
COROS Pace 4	COROS	6.0 days	Yes	Yes	Any phone	43 mm	AMOLED	Yes	19.0 days	120 min	Dual band	Yes	Yes	No	No	Stages (estimated)	No	5 ATM	No	No	Mic only	4.0 GB	32 g	Yes	#1	256	$249.00	500+
COROS Pace Pro	COROS	6.0 days	Yes	Yes	Any phone	46 mm	AMOLED	Yes	20.0 days	120 min	Dual band	Yes	Yes	No	No	Stages (estimated)	No	5 ATM	No	No	None	32.0 GB	37 g	Yes	#13	894	$299.00	100+
Garmin epix (Gen 2)	Garmin	6.0 days	Yes	Yes	Android phone	47 mm	AMOLED	Yes	16.0 days	—	Single band	Yes	Yes	No	No	Stages (estimated)	No	10 ATM	No	Yes	None	16.0 GB	76 g	Yes	#1,186	1,200	$629.99	—
Polar Pacer	Polar	6.5 days	Yes	Yes	Any phone	45 mm	MIP	Yes	6.5 days	—	Single band	Yes	No	No	No	Stages (estimated)	No	WR50	No	No	None	0.0 GB	23 g	Yes	—	1,700	$151.30	—
Polar Pacer Pro	Polar	6.5 days	Yes	Yes	Any phone	45 mm	MIP	Yes	6.5 days	—	Single band	Yes	No	No	No	Stages (estimated)	No	WR50	No	No	None	0.0 GB	23 g	Yes	—	1,500	$182.78	50+
Garmin fēnix 8 AMOLED 47mm	Garmin	7.0 days	Yes	Yes	Android phone	47 mm	AMOLED	Yes	16.0 days	—	Dual band	Yes	Yes	FDA cleared	Yes	Stages (estimated)	No	10 ATM	No	Yes	Speaker and mic	32.0 GB	59 g	Yes	—	1,200	$729.99	200+
Amazfit Bip Max	Amazfit	7.0 days	Yes	Yes	Android phone	50 mm	AMOLED	Yes	20.0 days	—	Single band	Yes	Yes	No	No	Stages (estimated)	No	5 ATM	No	No	Speaker and mic	4.0 GB	53 g	Yes	#6	742	$99.99	1,000+
Amazfit T-Rex 3	Amazfit	7.0 days	Yes	Yes	Android phone	49 mm	AMOLED	Yes	27.0 days	180 min	Dual band	Yes	Yes	No	Yes	Stages (estimated)	No	10 ATM	No	No	Mic only	26.0 GB	68 g	Yes	#105	2,500	$219.99	—
Garmin Instinct 3 AMOLED 45mm	Garmin	7.0 days	Yes	Yes	Android phone	45 mm	AMOLED	Yes	18.0 days	—	Dual band	Yes	Yes	No	No	Stages (estimated)	No	10 ATM	No	Yes	None	4.0 GB	53 g	Yes	#22	899	$346.00	1,000+
Amazfit Balance 3	Amazfit	7.0 days	Yes	Yes	Android phone	51 mm	AMOLED	Yes	21.0 days	—	Dual band	Yes	Yes	No	Yes	Stages (estimated)	No	10 ATM	No	No	Speaker and mic	64.0 GB	62 g	Yes	#165	91	$369.99	—
Garmin Forerunner 965	Garmin	7.0 days	Yes	Yes	Android phone	47 mm	AMOLED	Yes	23.0 days	—	Dual band	Yes	Yes	No	No	Stages (estimated)	No	5 ATM	No	Yes	None	32.0 GB	53 g	Yes	#382	2,000	$489.99	50+
Garmin quatix 8 47mm	Garmin	7.0 days	Yes	Yes	Android phone	47 mm	AMOLED	Yes	16.0 days	—	Dual band	Yes	Yes	FDA cleared	Yes	Stages (estimated)	No	10 ATM	No	Yes	Speaker and mic	32.0 GB	73 g	Yes	#1,253	65	$1,099.99	—
Xiaomi Redmi Watch 6	Xiaomi	7.0 days	Yes	Yes	Android phone	47 mm	AMOLED	Yes	12.0 days	—	Single band	Yes	Yes	No	No	Stages (estimated)	No	5 ATM	No	No	Speaker and mic	—	31 g	Yes	#208	1,300	$92.59	100+
COROS Pace 4 Pro	COROS	7.0 days	Yes	Yes	Any phone	48 mm	AMOLED	Yes	21.0 days	—	Dual band	Yes	—	No	No	Stages (estimated)	No	5 ATM	No	No	Speaker and mic	32.0 GB	51 g	Yes	#5	—	$449.00	—
Polar Grit X Pro	Polar	7.0 days	Yes	Yes	Any phone	47 mm	MIP	Yes	7.0 days	—	Single band	Yes	No	No	No	Stages (estimated)	No	WR100	No	No	None	0.0 GB	47 g	Yes	#1,854	481	$420.83	—
Suunto Race 2	Suunto	7.0 days	Yes	Yes	Any phone	49 mm	AMOLED	Yes	18.0 days	—	Dual band	Yes	Yes	No	No	Stages (estimated)	No	10 ATM	No	No	None	32.0 GB	76 g	Yes	#21	85	$499.00	—
Garmin Forerunner 970	Garmin	8.0 days	Yes	Yes	Android phone	47 mm	AMOLED	Yes	15.0 days	—	Dual band	Yes	Yes	FDA cleared	Yes	Stages (estimated)	No	5 ATM	No	Yes	Speaker and mic	32.0 GB	56 g	Yes	—	609	$749.99	500+
Garmin fēnix 8 Pro 47mm	Garmin	8.0 days	Yes	Yes	Android phone	47 mm	AMOLED	Yes	15.0 days	—	Dual band	Yes	Yes	FDA cleared	Yes	Stages (estimated)	No	10 ATM	Yes	Yes	Speaker and mic	32.0 GB	56 g	Yes	—	353	$1,099.99	50+
Garmin vívoactive 4	Garmin	8.0 days	Yes	Yes	Android phone	45 mm	MIP	Yes	8.0 days	—	Single band	Yes	Yes	No	No	Stages (estimated)	No	5 ATM	No	Yes	None	—	51 g	Yes	#1,727	17,300	$289.00	—
Amazfit Cheetah 2 Pro	Amazfit	8.0 days	Yes	Yes	Android phone	48 mm	AMOLED	Yes	20.0 days	—	Dual band	Yes	Yes	No	Yes	Stages (estimated)	No	5 ATM	No	No	Speaker and mic	32.0 GB	46 g	Yes	#757	20	$444.57	—
Amazfit T-Rex 3 Pro 48mm	Amazfit	9.0 days	Yes	Yes	Android phone	48 mm	AMOLED	Yes	25.0 days	—	Dual band	Yes	Yes	No	Yes	Stages (estimated)	No	10 ATM	No	No	Speaker and mic	26.0 GB	52 g	Yes	#176	590	$399.99	—
Garmin Instinct 3 AMOLED 50mm	Garmin	9.0 days	Yes	Yes	Android phone	50 mm	AMOLED	Yes	24.0 days	—	Dual band	Yes	Yes	No	No	Stages (estimated)	No	10 ATM	No	Yes	None	4.0 GB	59 g	Yes	#22	481	$399.99	—
Xiaomi Watch S5 46mm	Xiaomi	9.0 days	—	Yes	Android phone	46 mm	AMOLED	Yes	14.0 days	—	Dual band	Yes	Yes	No	No	Stages (estimated)	No	—	No	Yes	—	—	46 g	Yes	—	17	$194.99	—
Amazfit Active Max	Amazfit	10.0 days	Yes	Yes	Android phone	49 mm	AMOLED	Yes	25.0 days	—	Single band	Yes	Yes	No	Yes	Stages (estimated)	No	5 ATM	No	No	Speaker and mic	4.0 GB	40 g	Yes	#47	990	$169.99	1,000+
Amazfit T-Rex Ultra 2	Amazfit	10.0 days	Yes	Yes	Android phone	51 mm	AMOLED	Yes	30.0 days	—	Dual band	Yes	Yes	No	Yes	Stages (estimated)	No	10 ATM	No	No	Speaker and mic	64.0 GB	89 g	Yes	#673	96	$549.99	50+
Garmin D2 Mach 1 Pro	Garmin	10.0 days	Yes	Yes	Android phone	51 mm	AMOLED	Yes	25.0 days	—	Dual band	Yes	Yes	FDA cleared	Yes	Stages (estimated)	No	10 ATM	No	Yes	None	32.0 GB	60 g	Yes	#3,217	67	$1,399.99	—
Amazfit Balance Ultra	Amazfit	10.0 days	Yes	Yes	Android phone	52 mm	AMOLED	Yes	30.0 days	—	Dual band	Yes	Yes	No	Yes	Stages (estimated)	No	10 ATM	No	No	Speaker and mic	64.0 GB	57 g	Yes	#165	3	$599.99	—
Garmin epix Pro (Gen 2) 51mm	Garmin	11.0 days	Yes	Yes	Android phone	51 mm	AMOLED	Yes	31.0 days	—	Dual band	Yes	Yes	FDA cleared	Yes	Stages (estimated)	No	10 ATM	No	Yes	None	32.0 GB	70 g	Yes	#132	1,400	$599.00	—
Garmin fēnix 8 AMOLED 51mm	Garmin	13.0 days	Yes	Yes	Android phone	51 mm	AMOLED	Yes	29.0 days	—	Dual band	Yes	Yes	FDA cleared	Yes	Stages (estimated)	No	10 ATM	No	Yes	Speaker and mic	32.0 GB	74 g	Yes	—	1,200	$878.32	50+
Garmin tactix 8 AMOLED 51mm	Garmin	13.0 days	Yes	Yes	Android phone	51 mm	AMOLED	Yes	29.0 days	—	Dual band	Yes	Yes	—	No	Stages (estimated)	No	10 ATM	No	Yes	Speaker and mic	32.0 GB	92 g	Yes	#322	129	$1,399.99	50+
Garmin Forerunner 55	Garmin	14.0 days	Yes	Yes	Any phone	42 mm	MIP	Yes	14.0 days	—	Single band	Yes	No	No	No	Stages (estimated)	No	5 ATM	No	No	None	0.0 GB	37 g	Yes	#72	10,200	$158.00	500+
Garmin Forerunner 945 LTE	Garmin	14.0 days	Yes	Yes	Android phone	44 mm	MIP	Yes	14.0 days	—	Single band	Yes	Yes	No	No	Stages (estimated)	No	5 ATM	Yes	Yes	None	—	49 g	Yes	#66	270	$449.99	—
Garmin fēnix 8 Pro 51mm	Garmin	15.0 days	Yes	Yes	Android phone	51 mm	AMOLED	Yes	27.0 days	—	Dual band	Yes	Yes	FDA cleared	Yes	Stages (estimated)	No	10 ATM	Yes	Yes	Speaker and mic	32.0 GB	65 g	Yes	—	353	$1,196.99	—
COROS Apex 4 42mm	COROS	15.0 days	Yes	Yes	Any phone	43 mm	MIP	Yes	15.0 days	120 min	Dual band	Yes	Yes	No	No	Stages (estimated)	No	5 ATM	No	No	Speaker and mic	32.0 GB	44 g	Yes	#24	162	$429.00	50+
COROS Pace 3	COROS	15.0 days	Yes	Yes	Any phone	42 mm	MIP	Yes	15.0 days	120 min	Dual band	Yes	Yes	No	No	Stages (estimated)	No	5 ATM	No	No	None	4.0 GB	30 g	Yes	#7	622	$199.00	300+
Garmin Instinct E 45mm	Garmin	16.0 days	Yes	Yes	Android phone	45 mm	MIP	Yes	16.0 days	—	Single band	Yes	Yes	No	No	Stages (estimated)	No	10 ATM	No	No	None	0.1 GB	48 g	Yes	#164	694	$219.99	—
Garmin fēnix 9 Pro Solar 47mm	Garmin	21.0 days	Yes	Yes	Android phone	47 mm	MIP	Yes	21.0 days	—	Dual band	Yes	Yes	FDA cleared	Yes	Stages (estimated)	No	10 ATM	No	Yes	Speaker and mic	64.0 GB	63 g	Yes	—	14	$1,099.99	200+
Garmin Instinct 2S Solar	Garmin	21.0 days	Yes	Yes	Android phone	40 mm	MIP	Yes	21.0 days	—	Single band	Yes	Yes	No	No	Stages (estimated)	No	10 ATM	No	Yes	None	0.0 GB	43 g	Yes	—	234	$319.00	100+
COROS Nomad	COROS	22.0 days	Yes	Yes	Any phone	48 mm	MIP	Yes	22.0 days	120 min	Dual band	Yes	Yes	No	No	Stages (estimated)	No	5 ATM	No	No	Mic only	32.0 GB	49 g	Yes	#575	300	$349.00	—
COROS Apex 4 46mm	COROS	24.0 days	Yes	Yes	Any phone	46 mm	MIP	Yes	24.0 days	120 min	Dual band	Yes	Yes	No	No	Stages (estimated)	No	5 ATM	No	No	Speaker and mic	32.0 GB	51 g	Yes	#57	162	$479.00	—
Garmin Instinct 3 Solar 45mm	Garmin	28.0 days	Yes	Yes	Android phone	45 mm	MIP	Yes	28.0 days	—	Dual band	Yes	Yes	No	No	Stages (estimated)	No	10 ATM	No	Yes	None	0.1 GB	52 g	Yes	#22	850	$349.99	1,000+
Garmin fēnix 7X Pro Solar	Garmin	28.0 days	Yes	Yes	Android phone	51 mm	MIP	Yes	28.0 days	—	Dual band	Yes	Yes	FDA cleared	Yes	Stages (estimated)	No	10 ATM	No	Yes	None	32.0 GB	96 g	Yes	#171	389	$596.92	100+
Garmin Instinct Crossover Solar	Garmin	28.0 days	Yes	Yes	Android phone	45 mm	MIP	Yes	28.0 days	—	Single band	Yes	Yes	No	No	Stages (estimated)	No	10 ATM	No	Yes	None	0.1 GB	65 g	Yes	#441	388	$279.95	200+
Garmin quatix 7X Solar	Garmin	28.0 days	Yes	Yes	Android phone	51 mm	MIP	Yes	28.0 days	—	Dual band	Yes	Yes	No	No	Stages (estimated)	No	10 ATM	No	Yes	None	32.0 GB	89 g	Yes	#1,268	131	$578.00	—
Garmin Instinct 2 Solar	Garmin	28.0 days	Yes	Yes	Android phone	45 mm	MIP	Yes	28.0 days	—	Single band	Yes	Yes	No	No	Stages (estimated)	No	10 ATM	No	Yes	None	0.0 GB	53 g	Yes	—	807	$263.50	100+
Garmin tactix 8 Solar 51mm	Garmin	30.0 days	Yes	Yes	Android phone	51 mm	MIP	Yes	30.0 days	—	Dual band	Yes	Yes	—	No	Stages (estimated)	No	10 ATM	No	Yes	Speaker and mic	32.0 GB	92 g	Yes	#322	95	$1,399.99	50+
Garmin fēnix 9 Pro Solar 51mm	Garmin	30.0 days	Yes	Yes	Android phone	51 mm	MIP	Yes	30.0 days	—	Dual band	Yes	Yes	FDA cleared	Yes	Stages (estimated)	No	10 ATM	No	Yes	Speaker and mic	64.0 GB	77 g	Yes	—	14	$1,199.99	200+
Garmin Enduro 4	Garmin	36.0 days	Yes	Yes	Android phone	51 mm	MIP	Yes	36.0 days	—	Dual band	Yes	Yes	FDA cleared	Yes	Stages (estimated)	No	10 ATM	No	Yes	None	64.0 GB	57 g	Yes	#228	—	$899.99	—
Garmin Instinct 3 Solar 50mm	Garmin	40.0 days	Yes	Yes	Android phone	50 mm	MIP	Yes	40.0 days	—	Dual band	Yes	Yes	No	No	Stages (estimated)	No	10 ATM	No	Yes	None	0.1 GB	58 g	Yes	#22	455	$399.99	500+
Garmin Instinct 2X Solar	Garmin	40.0 days	Yes	Yes	Android phone	50 mm	MIP	Yes	40.0 days	—	Dual band	Yes	Yes	No	No	Stages (estimated)	No	10 ATM	No	Yes	None	0.1 GB	67 g	Yes	#19	24	$319.99	50+
Suunto Vertical	Suunto	60.0 days	Yes	Yes	Android phone	49 mm	MIP	Yes	60.0 days	90 min	Dual band	Yes	Yes	No	No	Stages (estimated)	No	10 ATM	No	No	None	—	69 g	Yes	#15	56	$349.00	30+
Garmin Approach S12	Garmin	70.0 days	Yes	Yes	Any phone	44 mm	MIP	Yes	70.0 days	—	Single band	No	No	No	No	Basic	No	5 ATM	No	No	None	—	34 g	Yes	—	3,100	$199.99	500+
Garmin fēnix 9 Pro 51mm	Garmin	—	Yes	Yes	Android phone	51 mm	AMOLED	Yes	31.0 days	—	Dual band	Yes	Yes	FDA cleared	Yes	Stages (estimated)	No	10 ATM	No	Yes	Speaker and mic	64.0 GB	73 g	Yes	—	28	$1,299.99	400+
Google Fitbit Sense 2	Google	—	Yes	Yes	Any phone	—	AMOLED	Yes	6.0 days	—	Single band	Yes	Yes	FDA cleared	Yes	Stages (estimated)	No	5 ATM	No	Yes	Speaker and mic	—	38 g	Yes	#41	10,200	$239.95	500+
CMF CMF Watch 3 Pro	CMF	—	Yes	Yes	Any phone	—	AMOLED	Yes	13.0 days	—	Dual band	Yes	Yes	No	—	Stages (estimated)	No	IP68	No	No	Speaker and mic	—	51 g	Yes	#28	2,400	$79.00	1,000+
Google Fitbit Versa 4	Google	—	Yes	Yes	Any phone	—	AMOLED	Yes	6.0 days	120 min	Single band	Yes	Yes	No	Yes	Stages (estimated)	No	5 ATM	No	Yes	Speaker and mic	—	38 g	Yes	—	4,300	$174.00	200+
Garmin Lily 2	Garmin	—	Yes	Yes	Android phone	35 mm	LCD	—	5.0 days	—	Connected	Yes	Yes	No	No	Stages (estimated)	No	5 ATM	No	No	None	—	24 g	Yes	#102	1,800	$249.99	1,000+
Samsung Galaxy Watch FE 40mm	Samsung	—	No	Yes	Samsung Galaxy phone	40 mm	AMOLED	Yes	1.7 days	—	Single band	Yes	Yes	FDA cleared	No	Stages (estimated)	Yes	5 ATM	Yes	Yes	Speaker and mic	16.0 GB	27 g	Yes	#304	214	$181.13	—
Samsung Galaxy Watch FE 40mm	Samsung	—	No	Yes	Samsung Galaxy phone	40 mm	AMOLED	Yes	1.7 days	—	Single band	Yes	Yes	FDA cleared	No	Stages (estimated)	Yes	5 ATM	No	Yes	Speaker and mic	16.0 GB	27 g	Yes	—	41	$119.98	—
Garmin Venu Sq 2	Garmin	—	Yes	Yes	Android phone	41 mm	AMOLED	Yes	11.0 days	—	Single band	Yes	Yes	No	No	Stages (estimated)	No	5 ATM	No	Yes	None	—	38 g	Yes	#605	1,900	$269.99	50+
Garmin Lily 2 Active	Garmin	—	Yes	Yes	Android phone	38 mm	LCD	—	9.0 days	—	Single band	Yes	Yes	No	No	Stages (estimated)	No	5 ATM	No	Yes	None	—	29 g	Yes	#109	948	$299.99	—
Garmin vívomove Trend	Garmin	—	Yes	Yes	Android phone	40 mm	LCD	No	5.0 days	—	Connected	Yes	Yes	No	No	Stages (estimated)	No	5 ATM	No	Yes	None	—	28 g	Yes	#239	1,000	$269.99	—
Garmin Approach S72 47mm	Garmin	—	Yes	Yes	Android phone	47 mm	AMOLED	Yes	16.0 days	—	Dual band	Yes	Yes	—	Yes	Stages (estimated)	No	5 ATM	No	Yes	Speaker and mic	64.0 GB	48 g	Yes	#159	1	$799.99	—
Garmin Approach S50	Garmin	—	Yes	Yes	Android phone	43 mm	AMOLED	Yes	10.0 days	—	Single band	Yes	Yes	No	No	Stages (estimated)	No	5 ATM	No	Yes	None	4.0 GB	29 g	Yes	#111	260	$393.99	300+
Garmin fēnix 9 51mm	Garmin	—	Yes	Yes	Android phone	51 mm	AMOLED	Yes	29.0 days	—	Dual band	Yes	Yes	FDA cleared	Yes	Stages (estimated)	No	10 ATM	No	Yes	Speaker and mic	64.0 GB	65 g	Yes	—	7	$1,149.99	—
Garmin Bounce	Garmin	—	Yes	Yes	Any phone	42 mm	LCD	—	2.0 days	—	Single band	No	No	No	No	Basic	No	5 ATM	Yes	No	Speaker and mic	—	37 g	Yes	#90	477	$119.00	500+
Garmin fēnix 9 Pro 47mm	Garmin	—	Yes	Yes	Android phone	47 mm	AMOLED	Yes	18.0 days	—	Dual band	Yes	Yes	FDA cleared	Yes	Stages (estimated)	No	10 ATM	No	Yes	Speaker and mic	64.0 GB	56 g	Yes	—	14	$1,099.99	—
Garmin quatix 8 Pro 47mm	Garmin	—	Yes	Yes	Android phone	47 mm	AMOLED	Yes	15.0 days	—	Dual band	Yes	Yes	FDA cleared	Yes	Stages (estimated)	No	10 ATM	Yes	Yes	Speaker and mic	32.0 GB	77 g	Yes	#1,889	12	$1,199.99	—
Garmin Bounce 2	Garmin	—	Yes	Yes	Any phone	43 mm	AMOLED	—	2.0 days	—	Single band	No	No	No	No	Basic	No	5 ATM	Yes	No	Speaker and mic	4.0 GB	27 g	Yes	—	223	$299.99	100+
mibro GS Explorer S	mibro	—	Yes	Yes	Any phone	48 mm	AMOLED	Yes	20.0 days	—	Dual band	Yes	Yes	No	No	—	No	10 ATM	No	No	Speaker and mic	—	71 g	Yes	#1,083	55	$159.99	—
Garmin fēnix 9 47mm	Garmin	—	Yes	Yes	Android phone	47 mm	AMOLED	Yes	16.0 days	—	Dual band	Yes	Yes	FDA cleared	Yes	Stages (estimated)	No	10 ATM	No	Yes	Speaker and mic	64.0 GB	53 g	Yes	#749	1	$1,069.99	—
Garmin Approach S44	Garmin	—	Yes	Yes	—	43 mm	AMOLED	—	10.0 days	—	Single band	No	No	No	No	Basic	No	5 ATM	No	No	None	—	42 g	Yes	#111	567	$299.99	400+
Amazfit Bip 5 Unity	Amazfit	—	Yes	Yes	Android phone	46 mm	LCD	—	11.0 days	—	Connected	Yes	Yes	No	No	Stages (estimated)	No	IP68	No	No	Speaker and mic	—	24 g	Yes	#135	897	$59.95	400+
Amazfit T-Rex Dual Solar	Amazfit	—	Yes	Yes	Android phone	51 mm	AMOLED	Yes	25.0 days	—	Dual band	Yes	Yes	No	No	Stages (estimated)	No	10 ATM	No	No	None	64.0 GB	69 g	Yes	#978	1	$649.99	30+
Amazfit Cheetah 2 Ultra	Amazfit	—	Yes	Yes	Android phone	47 mm	AMOLED	Yes	30.0 days	—	Dual band	Yes	Yes	No	No	Stages (estimated)	No	5 ATM	No	No	Speaker and mic	64.0 GB	52 g	Yes	#757	16	$599.99	—
Xiaomi Redmi Watch 5 Active	Xiaomi	—	Yes	Yes	Any phone	49 mm	LCD	—	18.0 days	—	None	Yes	Yes	No	No	Stages (estimated)	No	5 ATM	No	No	Speaker and mic	—	31 g	Yes	—	17,100	$43.49	100+
Amazfit Bip 3	Amazfit	—	Yes	Yes	Any phone	44 mm	LCD	—	14.0 days	—	None	Yes	Yes	No	No	Stages (estimated)	No	5 ATM	No	No	None	—	33 g	Yes	#1,853	4,100	$65.80	—
Amazfit GTS 4 Mini	Amazfit	—	Yes	Yes	Android phone	42 mm	AMOLED	—	15.0 days	120 min	Single band	Yes	Yes	No	No	Stages (estimated)	No	5 ATM	No	No	—	—	31 g	Yes	#1,209	5,200	$119.99	—
Amazfit T-Rex 2	Amazfit	—	Yes	Yes	Android phone	47 mm	AMOLED	Yes	24.0 days	120 min	Dual band	Yes	Yes	No	No	Stages (estimated)	No	10 ATM	No	No	None	—	67 g	Yes	#4,357	3,700	$199.99	—
Polar Vantage M3	Polar	—	Yes	Yes	Any phone	45 mm	AMOLED	Yes	8.0 days	—	Dual band	Yes	Yes	No	Yes	Stages (estimated)	No	WR50	No	No	None	32.0 GB	35 g	Yes	#54	85	$296.15	—
Suunto Vertical 2	Suunto	—	Yes	Yes	Android phone	49 mm	AMOLED	Yes	20.0 days	—	Dual band	Yes	Yes	No	No	Stages (estimated)	No	10 ATM	No	No	None	—	86 g	Yes	#18	69	$599.00	20+
Polar Ignite 2	Polar	—	Yes	Yes	Any phone	43 mm	LCD	—	5.0 days	—	Single band	Yes	No	No	No	Stages (estimated)	No	WR30	No	No	None	—	21 g	Yes	#296	1,800	$279.90	—
Suunto Race S	Suunto	—	Yes	Yes	Android phone	45 mm	AMOLED	Yes	9.0 days	—	Dual band	Yes	Yes	No	No	Stages (estimated)	No	5 ATM	No	No	None	32.0 GB	60 g	Yes	#16	191	$279.00	50+
Suunto Race	Suunto	—	Yes	Yes	Android phone	49 mm	AMOLED	Yes	16.0 days	—	Dual band	Yes	Yes	No	No	Stages (estimated)	No	10 ATM	No	No	None	16.0 GB	83 g	Yes	#16	110	$299.00	—
Suunto Ocean	Suunto	—	Yes	Yes	Android phone	50 mm	AMOLED	Yes	16.0 days	—	Dual band	Yes	Yes	No	No	Stages (estimated)	No	10 ATM	No	No	None	32.0 GB	99 g	Yes	—	46	$798.98	—
Suunto Run 2	Suunto	—	Yes	Yes	Android phone	46 mm	AMOLED	Yes	10.0 days	—	Dual band	Yes	Yes	No	No	Stages (estimated)	No	5 ATM	No	No	None	4.0 GB	35 g	Yes	#61	3	$297.07	—
OnePlus OnePlus Watch 4	OnePlus	—	No	Yes	Android phone	47 mm	LTPO OLED	Yes	5.0 days	—	Dual band	Yes	Yes	No	Yes	Stages (estimated)	No	5 ATM	No	Yes	Speaker and mic	32.0 GB	43 g	Yes	—	40	$369.00	—
OnePlus OnePlus Watch 3 43mm	OnePlus	—	No	Yes	Android phone	43 mm	AMOLED	Yes	2.5 days	60 min	Single band	Yes	Yes	No	No	Stages (estimated)	No	5 ATM	No	Yes	Speaker and mic	32.0 GB	38 g	Yes	#677	75	$249.00	50+
OnePlus OnePlus Watch 3 46mm	OnePlus	—	No	Yes	Android phone	46 mm	AMOLED	Yes	5.0 days	60 min	Dual band	Yes	Yes	No	Yes	Stages (estimated)	No	5 ATM	No	Yes	Speaker and mic	32.0 GB	50 g	Yes	—	310	$349.99	—
Withings ScanWatch Nova	Withings	—	Yes	Yes	Any phone	42 mm	PMOLED	No	35.0 days	120 min	Connected	Yes	Yes	FDA cleared	Yes	Stages (estimated)	No	10 ATM	No	No	None	—	63 g	Yes	#547	339	$599.95	—
Withings ScanWatch Light	Withings	—	Yes	Yes	Any phone	37 mm	PMOLED	No	35.0 days	120 min	Connected	Yes	No	No	No	Stages (estimated)	No	5 ATM	No	No	None	—	—	Yes	#442	4,900	$249.95	50+
mibro GS Active2	mibro	—	Yes	Yes	Any phone	46 mm	AMOLED	—	15.0 days	—	Dual band	Yes	Yes	No	No	—	No	5 ATM	No	No	Speaker and mic	—	40 g	Yes	#1,002	143	$79.99	—

QRueueThe ticket dispenser that never needs paperCustomers get their number on their phone. No paper, no machine.$99one-timeSee demo →Ad

Smartwatches for iPhone

Apple Watch is the only smartwatch that gets everything on an iPhone: replies to messages, calls through the watch and the full health app. Garmin, Amazfit, COROS, Polar, Suunto, Withings and Fitbit also pair with an iPhone and track just as well, but Apple limits what any other watch can do with notifications, so quick replies and some message features stay off.

Samsung Galaxy Watch and Google Pixel Watch do not work with an iPhone at all. They are Android only.
For long battery life on an iPhone, a Garmin or Amazfit lasts days to weeks where an Apple Watch lasts about one to two days.

Works with iPhone Apple Watch iPhone, over 7 days

Smartwatches for Android

On Android the choice opens up: Google Pixel Watch, Samsung Galaxy Watch, OnePlus Watch and every fitness brand all pair. The catch is Samsung: a Galaxy Watch on a phone from another brand loses ECG, blood pressure and sleep apnea alerts, because those features run through an app that only installs on Galaxy phones.

On a Samsung Galaxy phone, a Galaxy Watch gets everything.
On a Pixel or any other Android phone, a Pixel Watch or a Garmin loses nothing.

Works with Android Full features on any Android Galaxy Watch

Fitness and running watches

A running watch is judged by its GPS track and its battery during a workout, not by apps. Dual band GPS keeps the line on the road among tall buildings and under trees, and the hours of GPS recording decide whether it lasts a marathon or a week of training without a charge.

Garmin Forerunner, COROS, Polar and Suunto are built for this and work with any phone.
A MIP screen is dim indoors but stays readable in full sun and costs almost no battery.

Running watches Dual band GPS Outdoor watches

Platform lock-in comes before any spec

Decide this first, because no spec makes up for it. An Apple Watch does nothing on Android. A Galaxy Watch loses ECG and blood pressure off a Samsung phone. And the health features themselves are switched on country by country: ECG and blood pressure need approval in each market, so a watch bought in one country may not offer them in another.

Watch	On an iPhone	On a Samsung Galaxy phone	On another Android phone
Apple Watch (all models)	Everything	Does not work	Does not work
Samsung Galaxy Watch	Does not work	Everything	Loses ECG, blood pressure and sleep apnea alerts (they need Samsung Health Monitor, Galaxy phones only)
Google Pixel Watch	Does not work	Everything	Everything
OnePlus Watch, TicWatch	Does not work	Everything	Everything
Garmin	Loses quick text replies, rejecting a call with a text and notification images	Everything	Everything
Amazfit	Loses quick replies to calls and messages, voice-to-text and picture messages	Everything	Everything
Google Fitbit Versa and Sense	Everything	Everything	Everything
COROS, Polar, Suunto, Withings	Everything	Everything	Everything

The table above is the matrix nobody puts in a comparison: your phone against the watch against exactly what you lose. If you might change phones in the next two years, the brands that work fully with any phone are the safe choice. Choosing the phone at the same time? The iPhone comparison and the phone comparison list every unlocked model on sale on each side of that split.

Full features on any phone iPhone only Best on a Galaxy phone

Battery life with the screen always on

Most makers quote battery life with the always-on display switched off, which is not how most people wear a watch. The table is sorted by the always-on figure instead: the maker's own number where it publishes one, a measured review figure where it does not.

Watch	Quoted	Always-on	Lost to always-on	GPS recording	Always-on figure from
Garmin Approach S12	70 days	70 days	None	30 h	Maker
Suunto Vertical	60 days	60 days	None	60 h	Maker
Garmin Instinct 2X Solar	40 days	40 days	None	60 h	Maker
Garmin Enduro 3	36 days	36 days	None	120 h	Maker
Garmin Enduro 4	36 days	36 days	None	80 h	Maker
Garmin tactix 8 Solar	30 days	30 days	None	95 h	Maker
Garmin Instinct 3 Solar	28 days	28 days	None	40 h	Maker
Garmin Instinct 2 Solar	28 days	28 days	None	30 h	Maker
Garmin Instinct Crossover Solar	28 days	28 days	None	25 h	Maker
Garmin fēnix 7X Pro Solar	28 days	28 days	None	89 h	Maker
Garmin quatix 7X Solar	28 days	28 days	None	89 h	Maker
COROS Nomad	22 days	22 days	None	50 h	Maker
Garmin fēnix 9 Pro Solar	21 days	21 days	None	54 h	Maker
Garmin Instinct 2S Solar	21 days	21 days	None	22 h	Maker
Suunto 9 Peak Pro	21 days	21 days	None	40 h	Maker
Garmin Instinct E	16 days	16 days	None	24 h	Maker
COROS Pace 3	15 days	15 days	None	38 h	Maker
COROS Apex 4	15 days	15 days	None	41 h	Maker
Garmin Forerunner 55	14 days	14 days	None	20 h	Maker
Garmin Forerunner 945 LTE	14 days	14 days	None	35 h	Maker
Garmin fēnix 7S	11 days	11 days	None	37 h	Maker
Amazfit Active Max	25 days	10 days	60%	64 h	Maker
Amazfit T-Rex Ultra 2	30 days	10 days	67%	50 h	Maker
Garmin D2 Mach 1 Pro	25 days	10 days	60%	82 h	Maker
Amazfit Balance Ultra	30 days	10 days	67%	50 h	Maker
Amazfit T-Rex 3 Pro	25 days	9 days	64%	38 h	TechRadar
Xiaomi Watch S5	14 days	9 days	36%		Maker
Garmin Forerunner 970	15 days	8 days	47%	26 h	Maker
Garmin fēnix 8 Pro	15 days	8 days	47%	44 h	Maker
Garmin vívoactive 4	8 days	8 days	None	18 h	Maker

GPS recording is the other big drain: the last column shows how many hours each watch records GPS on a full charge. Continuous heart rate costs much less, and no maker quotes that cost separately.

Over 7 days always on MIP screens Always-on display

Which sensors are real and which are estimates

Some readings come from a sensor and some from an algorithm that guesses from other readings. Heart rate, SpO2, ECG and skin temperature are measured. Sleep stages and blood pressure are estimated: useful as a trend, not as a number to act on.

Reading	How it is obtained	Clearance	Models with it
Heart rate	Measured by an optical sensor	None needed	128
SpO2 (blood oxygen)	Measured by the optical sensor	Wellness feature, not a medical device	118
ECG	Measured by electrodes in the case and crown	FDA clearance in the US, country by country elsewhere	38
Skin temperature	Measured by a temperature sensor	None needed	59
Sleep stages	Estimated by an algorithm from movement and heart rate	None	126
Blood pressure	Estimated by an algorithm, calibrated with a cuff at best	Wellness or notification feature, not a cuff reading	15

ECG is the one reading that needs regulatory clearance: in the US that means FDA clearance, and each country decides separately. The ECG column in the table shows which watches have it cleared here.

ECG cleared in the US Skin temperature SpO2

Smartwatch Comparison

Which ones work with your phone, how long they really last with the screen always on, and what each platform locks away