Smartwatches · 2025 · Apple
The Apple Watch SE 3 is Apple's entry smartwatch: S10 chip, the first Always-On LTPO OLED display in the line, fast charging, a temperature sensor, sleep score and a speaker. It has no ECG or blood oxygen measurement, uses single-frequency GPS, its battery can be limited to about a day under heavy use, and it works only with an iPhone.
44 mm GPS · aluminium case (Midnight / Starlight)
| Specification | Value |
|---|---|
| Announcement | September 9, 2025; on sale from September 19, 2025 |
| Case | 44 mm aluminium; 44 × 38 × 10.7 mm |
| Weight | 32.9 g (GPS) |
| Display | Always-On Retina, LTPO OLED; 368 × 448 pixels, 977 mm², 326 ppi |
| Brightness | 1,000 nits peak; 2 nits minimum |
| Front glass | Ion-X glass |
| Processor | Apple S10 SiP; 64-bit dual-core processor, 4-core Neural Engine |
| Storage | 64 GB |
| Sensors | Second-generation optical heart sensor, temperature sensor, compass, always-on altimeter, high-g accelerometer, high dynamic range gyroscope, ambient light sensor |
| Health features | Heart rate and rhythm notifications, sleep apnoea notifications, sleep stages and sleep score, cycle tracking |
| Gestures | Double tap; wrist flick (watchOS 26) |
| Speaker | Yes; can play music and podcasts |
| Water resistance | 50 metres (ISO 22810:2010); swimproof |
| Wireless | Wi-Fi 4 (802.11n, 2.4 GHz only); Bluetooth 5.3 |
| Location | L1 GPS, GLONASS, Galileo, QZSS, BeiDou |
| Battery life | Up to 18 hours of normal use; up to 32 hours in Low Power Mode |
| Charging | Fast charging: about 80% in 45 minutes; 15 minutes gives up to 8 hours of use |
| Compatibility | iPhone 11 or later, iPhone SE (2nd generation) or later |
| Colour options | Midnight or Starlight aluminium case |
Apple says the SE 3 brings an Always-On display, fast charging and health features to an affordable watch, charging up to 2x faster than the previous generation and reaching about 80% in 45 minutes. Apple Support
Expert Reviews says average and maximum heart rate on runs stayed within 1.24% of other devices, but the watch occasionally lost its lock and left gaps. GPS was good enough for distance and pace training, though it smoothed corners, placed the runner on the road instead of the pavement and struggled under trees.
Expert Reviews: Apple Watch SE 3 reviewThe same review finds the 1,000-nit display readable in most conditions but smaller and dimmer than the Series 11; the reviewer charges it daily and names battery life as the main weakness.
Expert Reviews: Apple Watch SE 3 reviewAmong 44 mm buyers on Skroutz, Yannis Ag says the watch lasts more than a day with Always-On turned off, while Milton_Kevoh finds battery drain too high. Several 40 mm buyers on the same page (Polyxeni_Iordanou, panhri, Manos__t) complain that it does not last a full day.
Skroutz: Apple Watch SE 3 44mm Midnight user reviewsOn Skroutz, SMA_R says the speaker is quiet and can be covered on thick wrists, making calls hard to hear; Prokopios_Kefalas, after about two months, says the case scratches easily and finds sleep tracking useful.
Skroutz: Apple Watch SE 3 44mm Midnight user reviewsOn Coolblue, Bob says that on his own 40 mm watch the battery often lasted a day and a half, the sleep score was always high even after short, restless nights, and the screen is small with thick bezels.
Coolblue: Apple Watch SE 3 44mm Starlight customer reviews