Apple Watch Series 10

Where Series 10 sits now

Series 10 was announced on 9 September 2024 at $399. Series 11 followed in 2025 and Series 12 in 2026, both at the same $399, so a Series 10 needs a real discount to make sense. Here’s what the newer two add:

Spec	Series 10	Series 11	Series 12
US launch price	$399 (2024)	$399 (2025)	$399 (2026)
Battery, normal use	Up to 18 hours	Up to 24 hours	Up to 24 hours
Low Power Mode	Up to 36 hours	Up to 38 hours	Up to 38 hours
Cellular	LTE and UMTS	5G RedCap	5G RedCap
Chip	S10	S10	S11
Health Sensing System	No	No	Yes
Sleep score, hypertension notifications	Added with watchOS 26	Yes	Yes
Once-a-second Always On	Yes	Yes	Yes

The chip is the same S10 on Series 10 and 11, and all three update Always On once a second. What the newer models buy you is battery, 5G and, on Series 12, the Health Sensing System, a readiness score, Audio Intelligence and a 10-hour outdoor workout rating. Series 11 vs Series 12 covers the newest step.

The Ultra is a different watch: an Action Button, satellite messaging, a 40m dive rating and a 3,000-nit screen. Series 10 vs Ultra 4 lays out the trade.

The screen that started once-a-second Always On

Apple says the wide-angle LTPO3 OLED is more power efficient, which let Always On go from updating once a minute to once a second. On select faces, a seconds hand keeps ticking with your wrist down. Series 9 and earlier update about once a minute.

Peak brightness is 2,000 nits, the screen dims to 1 nit, and Apple says it’s up to 40% brighter at an angle. It’s 374 × 446 pixels on the 42mm (989 sq mm) and 416 × 496 on the 46mm (1,220 sq mm), at 326 ppi, and Series 11 kept the same resolution.

A thinner case

Both sizes are 9.7mm thick. The 42mm measures 42 × 36mm and fits 130–200mm wrists; the 46mm is 46 × 39mm and fits 140–245mm. Aluminum models use Ion-X glass, and Grade 5 titanium, which replaced stainless steel, gets a sapphire crystal. The 46mm aluminum GPS model weighs 36.4 grams, against 37.8 for Series 11.

Health and sleep

Series 10 has the third-generation optical heart sensor, the electrical sensor for ECG, Blood Oxygen, a wrist temperature sensor, and sleep stages with sleep apnea notifications. Sleep score and hypertension notifications came later, with watchOS 26. What it doesn’t get is Series 12’s Health Sensing System and readiness score.

Battery and charging

Mode	Series 10
Normal use	Up to 18 hours
Low Power Mode	Up to 36 hours
Fast charge	About 80% in 30 minutes
15-minute charge	Up to 8 hours of normal use
8-minute charge	Up to 8 hours of sleep tracking

Fast charging makes the 18 hours easier to live with, but it’s still a daily charge. Apple gives Series 10 no separate GPS workout rating.

Water, maps and GPS

It’s water resistant to 50m and IP6X dust resistant, and the depth gauge and water temperature sensor work with Oceanic+ for snorkeling. GPS is single-frequency L1, with GLONASS, Galileo, QZSS and BeiDou. Hikers get offline maps, Backtrack, U.S. topographic maps and curated hikes in 63 U.S. national parks.

Software

Series 10 launched on watchOS 11 and gets watchOS 27. Siri runs on-device and double tap works; wrist flick isn’t in Series 10’s specs. Apple Pay and GymKit are built in.

Price

Series 10 started at $399 in the US. Pre-orders opened on 9 September 2024 and it reached stores on 20 September 2024. Each box has the watch, one band and a Magnetic Fast Charger to USB-C cable (1m), and cellular models need a carrier plan. Series 11 and 12 launched at the same $399, so a Series 10 deal makes sense only if it clearly undercuts their current prices; check those before you buy.