Everyday smartwatch~$249

Apple

Apple Watch SE 3

Name: Apple Watch SE 3
Brand: Apple
Price: 249 USD
Availability: InStock

iPhone onlyPaid tier: Apple Fitness+2 FDA-cleared features

Launched in 2025 and still Apple's entry model, the SE 3 has an always-on display, a temperature sensor with sleep score, and 5G on cellular versions. Apple says its Ion-X glass is 4x more crack resistant than SE 2's. It skips the ECG app, hypertension notifications and blood-oxygen sensor found on Series 12, and runs the older S10 chip.

Approx. price

~$249

maker's list price, not a live price

Battery, smartwatch mode

18 h

the maker's headline

Battery, always-on display

not published

the maker gives no figure

Battery, GPS workout

7 h

maker's figure

Works with

iPhone only

see the limits below

Weight

26.3 g

aluminum, GPS, case only (Apple spec page)

Best for: First-time iPhone watch buyers, or a child's watch set up through Apple Watch For Your Kids

Battery: the claim and the other two figures

Claimed (smartwatch mode): 18 h
With always-on display: not published
GPS workout: 7 h

Headline: Apple: 'All-day battery life, up to 18 hours of normal use' (both sizes).
GPS: Apple: 'Up to 7 hours workout tracking' — outdoor run, without iPhone, heart rate on (L1 GPS).
Apple: up to 32 hours in Low Power Mode (including 6 hours of sleep tracking); 18-hour figure excludes sleep tracking

The ring’s outer track is the headline claim; the inner two are the always-on and GPS figures as a share of it. An empty track means Apple does not publish that figure. Why the figures differ

Phones, paid tier and updates

iPhone:: Yes.
Android:: No.; Needs iPhone 11 or later with iOS 27 or later; Apple sells no Android pairing
Paid tier:: Apple Fitness+, $79.99/year.; No watch feature requires it; it adds guided workout and meditation video classes that use the watch's metrics on screen; Watch plus two years of Apple Fitness+: ~$409.
LTE:: GPS + Cellular version needs a carrier plan; the carrier sets the price (apple.com/watch/cellular)
Software updates:: Apple does not publish a guaranteed number of update years for this model.

Cleared health features

Irregular rhythm notifications (FDA)FDA De Novo DEN180042 'Irregular Rhythm Notification Feature', Apple Inc., granted 09/11/2018; listed on this model's spec page Source
Sleep apnea notifications (FDA)FDA 510(k) K240929 'Sleep Apnea Notification Feature (SANF)', Apple Inc., cleared 09/13/2024; Apple: available on Series 9 and later, Ultra 2 and later, and SE 3 Source

A clearance says what a feature is allowed to claim, not that it replaces a doctor. Cleared versus wellness features

What the extra money buys: The cheapest Apple everyday smartwatch here. 1 pricier sibling in the same line: Apple Watch Series 12.

Specifications

Approx. price: ~$249 (40mm aluminum GPS, 'From $249' on apple.com/shop/buy-watch)
Type: Everyday smartwatch
Platform: watchOS
Case sizes: 40 mm / 44 mm
Weight: 40 mm: 26.3 g · 44 mm: 32.9 g (aluminum, GPS, case only (Apple spec page))
Battery, smartwatch mode: 18 h (Apple: 'All-day battery life, up to 18 hours of normal use' (both sizes))
Battery, always-on display: Not published by the maker
Battery, GPS workout: 7 h (Apple: 'Up to 7 hours workout tracking' — outdoor run, without iPhone, heart rate on (L1 GPS))
Battery note: Apple: up to 32 hours in Low Power Mode (including 6 hours of sleep tracking); 18-hour figure excludes sleep tracking
Works with: iPhone only
iPhone: Yes
Android: No
Phone limits: Needs iPhone 11 or later with iOS 27 or later; Apple sells no Android pairing
Paid tier: Apple Fitness+, $79.99/year
What the paid tier gates: No watch feature requires it; it adds guided workout and meditation video classes that use the watch's metrics on screen
Update years: Not published by the maker
Cleared health features: Irregular rhythm notifications (FDA), Sleep apnea notifications (FDA)
Display: OLED
Always-on display: Yes
Dual-band GPS: No
Maps: Downloadable maps, no topo (Apple: 'Offline maps with custom route creation' plus 'Topographic maps for thousands of national and regional parks (U.S. only)' — not worldwide topo)
Music on the watch: Yes
LTE: Optional (GPS + Cellular version needs a carrier plan; the carrier sets the price (apple.com/watch/cellular))
Contactless pay: Yes
Flashlight: No
Water rating: 50 m (ISO 22810:2010)
Case: aluminum
Released: 2025

Features, per Apple

S10 chip, 64GB storage
Always-On Retina display, 1000 nits
Irregular rhythm and sleep apnea notifications
Temperature sensor and sleep score
5G RedCap on cellular models
Offline maps with custom routes

Where the specs put it ahead

Cheapest way into watchOS with sleep apnea and irregular rhythm alerts
40 mm version weighs 26 g, the lightest Apple Watch
Same app catalog, Apple Pay and offline maps as the Series 12
Cellular version supports Apple Watch For Your Kids for a phone-free child

What it gives up

18-hour rating is the shortest here; overnight sleep tracking needs Low Power Mode or a top-up
No ECG app, hypertension notifications or blood oxygen, which Series 12 has
7-hour workout figure rules out long races
Older S10 chip misses the Audio Intelligence features of Series 12

The two lists above are drawn from the maker’s own pages and prices, not from owner reports. Where owner discussion has been read it appears in its own section below, so the two are never mistaken for each other.

What owners say

From what 17 owners of the Apple Watch SE 3 reported between July and October 2026. Earlier generations are not counted.

Much of what SE 3 owners talk about is getting the watch working the way they expected, not the hardware itself. As a first Apple Watch it wins people over on comfort, with one owner with a very small wrist happy with the 40 mm, and another coming from a Series 3 calling it light and fast enough that the Series 12 wasn't worth the extra money.

The friction is in software and battery. Owners report third-party apps that lean on the iPhone (YouTube Music) or don't pass notifications through (Instagram, Messenger), setup held up by required updates, and one owner whose sleep tracking stops after an hour or two each night. Battery reports from new owners are worrying in places: a cellular 40 mm used by a child with no Wi-Fi was projected to last around seven and a half hours, though another owner has left their iPhone behind for days on cellular without trouble so far.

Durability reports point both ways: one owner's screen has survived drops untouched, while another cracked the back glass, probably in a fall. It suits iPhone owners who want a light, inexpensive first watch and don't need the ECG app; parents planning to rely on cellular alone should test the battery during the return window.

What owners like

One owner says it feels light, and another with a very small wrist says the 40 mm doesn't look bulky
One owner's screen is still unmarked after drops, knocks against walls and a cat batting it around, while a friend's Series 11 is scratched
One owner upgrading from a Series 3 says it feels fast and the bigger always-on screen is a real step up, enough to skip the Series 12

Common complaints

Battery can drain fast early on: one owner saw 30% gone in four hours on day one, and a parent whose child used the cellular 40 mm with no Wi-Fi was at 33% after five hours even in Low Power Mode
Third-party apps are hit and miss: owners report YouTube Music refusing to play without the iPhone, and Instagram and Messenger notifications never reaching the watch despite re-pairing
Setup can stall on a required update: one owner's update estimate kept jumping to hours on fast Wi-Fi, and another was told to update the iPhone before the watch would pair
Some owners report early hardware faults, including a touchscreen that stops responding while the buttons still work, an orange line along the screen edge in sunlight and a speaker louder on one side; one owner had theirs replaced

Questions owners ask about the Apple Watch SE 3

How long does the cellular SE 3 last without a phone or Wi-Fi?

Not long, in one parent's report: a 40 mm cellular model used by a child on a trip, with Low Power Mode on and the always-on display and raise-to-wake off, was at 33% after five hours. Another owner using the cellular model without an iPhone for a few days said it was going fine but gave no battery figure.

Does the SE 3 have the ECG app?

No. One owner bought it for a family member and only found out afterwards that it can't take an ECG; that needs a Series or Ultra model.