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Home / Electronics / Smartwatches / Best Smartwatches for iPhone

Best Smartwatches for iPhone

Only the watches that fit "best smartwatch for iphone", worn for two weeks against a chest strap and reference GPS.

Last Updated: Sep 2026 · prices checked weekly
Suggested smartwatches for you
GGarmin Venu 3 Fair 7.9
12 days measured — longest here with an AMOLED s...Learn More
We Recommend
AApple Watch Series 10 Good 8.1
Lowest heart-rate error on intervals; GPS within...Learn More
GGarmin Forerunner 265 Fair 7.9
Most accurate GPS in the test — dual-band held t...Learn More
for iphone SmartwatchesSmartwatch for androidSmartwatch battery lifeSmartwatch for health monitoringSmartwatch for seniors
1

Apple Watch Series 10 (42 mm, GPS) - The best smartwatch there is — thinner, with a bigger wide-angle OLED, sleep apnoea detection and the fastest heart-rate response we measured — if you have an iPhone Tested Aug 2026 by Team RankingRight

  • Lowest heart-rate error on intervals; GPS within 0.5% on our 5K
  • ECG, sleep apnoea notifications, temperature, fall and crash detection
  • The app and notification experience nothing else matches
Good 8.1 See Price
$399 · checked Sep 11 iPhone only 1.5 days
2

Garmin Venu 3 (45 mm) - Garmin's lifestyle watch: a bright AMOLED, calls from the wrist, sleep coaching and 12 days of battery, with fewer running metrics than the Forerunner Tested Aug 2026 by Team RankingRight

  • 12 days measured — longest here with an AMOLED screen
  • Speaker and mic for calls; wheelchair mode; nap detection
  • Sleep coach and Body Battery explain the numbers
Fair 7.9 See Price
$449.99 · checked Sep 11 iPhone and Android 12 days
3

Garmin Forerunner 265 (46 mm) - A running watch with an AMOLED screen, dual-band GPS that never drifted in our tests, training readiness and 13 days of battery — for either phone Tested Aug 2026 by Team RankingRight

  • Most accurate GPS in the test — dual-band held the line under trees and buildings
  • Training load, readiness and race predictor that runners use
  • 11 days measured with daily GPS runs
Fair 7.9 See Price
$449.99 · checked Sep 11 iPhone and Android 11 days
4

Amazfit Balance (46 mm) - An AMOLED watch with dual-band GPS, body composition, two weeks of battery and Zepp's AI coach for $230 — the budget Garmin alternative Tested Aug 2026 by Team RankingRight

  • 13 days measured with daily GPS
  • Dual-band GPS within 1.2% on the 5K
  • Body composition, readiness and sleep scores
Fair 7.8 See Price
$229.99 · checked Sep 11 iPhone and Android 13 days
5

Apple Watch SE (2nd gen, 40 mm, GPS) - Most of the Apple Watch for $249: same apps, notifications, fall and crash detection and family setup, without the always-on screen, ECG or temperature Tested Aug 2026 by Team RankingRight

  • Same watchOS, apps and safety features as the Series 10
  • Family Setup lets a child or parent use it without an iPhone
  • Heart rate within 2 bpm on our runs
Fair 7.6 See Price
$249 · checked Sep 11 iPhone only 1.5 days

Frequently asked questions about smartwatches

Apple Watch or Garmin?
If you have an iPhone and want a watch that does everything — messages, payments, apps, calls — the Apple Watch is the best smartwatch made; it lasts a day and a half. If you run or ride seriously, a Garmin tracks more accurately over long sessions, lasts a week or two and works with either phone, and is a worse smartwatch. Most people who ask this question want the Apple Watch.
Which watch has the most accurate heart rate?
Against a chest strap on steady runs every watch here was within 2–3 bpm on average. On intervals the Apple Watch Series 10 and Garmin Forerunner 265 tracked the fastest; the Amazfit and Fitbit lagged on sharp changes. For medical-grade readings use a strap — every maker says so.
Do I need LTE?
Only if you want to leave the phone at home and still take calls and stream music. It adds $50–$100 to the watch and about $10 a month to the phone plan. Runners who carry a phone anyway can skip it.
How do you test smartwatches?
Two testers wear each watch for a week each alongside a chest strap on every run, a 5K on a measured course for GPS, and the same interval session. We log heart-rate error, GPS distance error and sleep-staging consistency, time the battery with always-on display and a daily 30-minute GPS workout, and use every smart feature with the matching phone.

*Scores: Health & fitness accuracy 30 · Battery 20 · Smart features & ecosystem 20 · Design & display 10 · Value 20; score = Σ ÷ 10, ties break on the earlier test date. Prices shown were checked on the date beside each and may change. Affiliate links are added only after a score is locked and can never change it. How we rank.

#1 Apple Watch Series 108.1 · $399
See Price