Apple Watch Series 10 Review: The Thinnest Watch, the Biggest Screen

Apple took the Apple Watch and put it on a diet. The Series 10 is 10% thinner than its predecessor, and somehow that modest reduction changes how the watch feels on your wrist more than any software update or new sensor ever could.

We’ve been wearing the Series 10 daily for two months, and the most consistent observation is this: we forget it’s there. That sounds like faint praise until you consider that previous Apple Watch models — even the excellent Series 9 — always had a slight presence on the wrist. The Series 10 disappears. And for a device you wear 20+ hours a day, disappearing is the highest compliment.

The Display: Bigger Than You’d Expect

Apple increased the display size yet again. The 46mm model now has a screen area that’s comparable to the first-generation Apple Watch Ultra, while being dramatically thinner and lighter. The wide-angle OLED display remains visible from extreme angles, which matters more than you’d think when glancing at your wrist during a conversation or while driving.

The always-on display has been refined — it refreshes more frequently in ambient mode, making complications feel more alive. The brightness in direct sunlight is excellent, hitting 2,000 nits peak. We never struggled to read the display in any lighting condition.

Thinner Without Compromise

At 9.7mm thick (versus 10.7mm for the Series 9), the Series 10 slides under shirt cuffs more easily and feels less intrusive during workouts. The reduction is barely visible on paper but tangible on your wrist. Apple achieved this through a new stacked system-in-package design that consolidates internal components.

The S10 chip inside is marginally faster than the S9, but honestly, Apple Watch has been performance-sufficient for years. Everything is instant. Apps load without delay. Siri responds immediately. The watch was never slow, and now it’s still not slow but slightly smaller. Fair enough.

Health Features

Sleep apnea detection is the headlining new health feature. The watch monitors breathing patterns during sleep and can alert you to signs of moderate-to-severe sleep apnea. It’s not a medical diagnosis — it’s a screening tool that encourages you to see a doctor. We appreciate the cautious approach.

The existing health suite remains comprehensive: blood oxygen monitoring, ECG, heart rate tracking, fall detection, crash detection, temperature sensing, and menstrual cycle tracking. The Apple Watch continues to be the most capable health monitoring device you can wear on your wrist.

Water temperature sensing is a new addition that’s genuinely fun. When swimming, the watch displays water temperature and logs it with your workout. It’s a small feature that made pool workouts and ocean swims slightly more interesting.

WatchOS and Daily Use

WatchOS 11 brings Smart Stack improvements, the Vitals app for morning health summaries, and training load tracking for fitness enthusiasts. The Vitals app has become our favorite morning ritual — a quick glance at overnight data including heart rate, respiratory rate, sleep duration, and blood oxygen provides a useful snapshot of recovery.

Double-tap gesture (pinching thumb and index finger) remains one of the most useful features. Answering calls, dismissing alarms, pausing timers — all without touching the screen. It’s the kind of natural interaction that makes you wonder why it took this long.

Notifications continue to be the Apple Watch’s core utility. Feeling a gentle tap on your wrist, glancing down to see who texted, and deciding whether to respond or keep your phone in your pocket — this basic loop is why most people wear an Apple Watch, and it works flawlessly.

Battery Life: The Eternal Compromise

18 hours. Still 18 hours. Apple has claimed 18-hour battery life for every Apple Watch since the Series 3, and the Series 10 maintains this tradition.

In practice, with always-on display, sleep tracking, and a 30-minute workout, we ended each day at 25-35% battery. That’s enough for sleep tracking overnight if you top up for 15 minutes before bed (the Series 10 reaches 80% in about 30 minutes of charging).

But it’s still frustrating. We wish Apple would make the watch slightly thicker and give us two-day battery life. The Apple Watch Ultra 2 proves it’s possible. The fact that Apple chose thinner over longer-lasting for the mainstream model says a lot about their design priorities.

Bands and Customization

The Series 10 is compatible with all existing Apple Watch bands for its size. Apple also introduced new titanium milanese and braided options that look premium. The color options — jet black, rose gold, and silver aluminum — are tasteful if conservative.

The band ecosystem remains Apple Watch’s secret weapon. No other smartwatch offers this range of first-party and third-party band options. You can own one watch and have a dozen looks.

Who Should Upgrade

Coming from a Series 7 or older? The upgrade is significant — larger display, better health sensors, faster charging, and the thinner design make it feel like a generational leap.

Series 8 or 9 owners? The improvements are incremental. The thinner design is nice, and sleep apnea detection is useful if relevant to you, but there’s no single feature that demands an upgrade.

First-time Apple Watch buyers? This is the one to get. It’s the best overall Apple Watch Apple has ever made, offering the ideal balance of size, features, and price. If you’re torn between this and the Ultra, our Apple Watch Ultra 2 vs Series 10 comparison breaks down every difference.

Apple Watch Series 10 on Amazon (paid link) (paid link)

The Verdict

The Apple Watch Series 10 refines an already excellent product. The thinner design genuinely improves wearability. The larger display shows more information at a glance. The health features continue to expand. It won’t revolutionize your life if you’re upgrading from a recent model, but as the best smartwatch on the market, it extends its lead.

OnVerdict Score: 8.5/10 — Thinner, bigger, and still the best smartwatch money can buy.