WhichOneToGet
Compare ยท Updated 19 Oct 2026

Apple Watch Series 12 vs Apple Watch Ultra 4

Get the Apple Watch Series 12. Unless you hike, run long distances or dive, or are tired of charging every night โ€” then the Ultra 4 lasts about two days.

Apple Watch Series 12
Our pick

Apple Watch Series 12

The best smartwatch for iPhone owners: excellent health and heart-rate tracking, a new daily Readiness score and a bright screen. Battery still lasts about a day.

Apple Watch Ultra 4

Apple Watch Ultra 4

The Apple Watch for adventures and long days: about two days of battery, dual-band GPS, a tough titanium case, a very bright screen and satellite SOS.

We earn a commission from these links.

The short answer

The Series 12 has most of the same health features for about half the price. The Ultra 4 lasts about twice as long and adds accurate dual-band GPS and a tough titanium and sapphire case, but it's big at 49mm.

Get the Apple Watch Series 12 if
  • โ€”You want the best all-round smartwatch for iPhone.
  • โ€”You don't mind charging every night.
  • โ€”You have a smaller wrist.
Check price at CurrysBuy โ†—
Get the Apple Watch Ultra 4 if
  • โ€”You hike, run long distances, swim or dive.
  • โ€”You're tired of charging every night.
  • โ€”You want accurate GPS on trails.
Check price at CurrysBuy โ†—

Key differences

Battery
About a day
Apple Watch Series 12
About two days; 25 or 45 hours in extended GPS modes
Apple Watch Ultra 4
GPS
Less precise than dual-band
Apple Watch Series 12
Accurate dual-band GPS
Apple Watch Ultra 4
Health features
ECG, blood oxygen, Readiness score
Apple Watch Series 12
Most of the same
Apple Watch Ultra 4
Size
42mm
Apple Watch Series 12
49mm; big and heavy on smaller wrists
Apple Watch Ultra 4

Pros and cons

Apple Watch Series 12
  • +Accurate heart-rate and health tracking
  • +Daily Readiness score
  • +Bright, always-on screen
  • โˆ’Battery lasts about a day, so it charges nightly.
  • โˆ’Looks almost identical to the last two models.
  • โˆ’Some new features arrive later in software updates.
  • โˆ’Its GPS isn't as precise as the Ultra's dual-band GPS.
Apple Watch Ultra 4
  • +About two days of battery
  • +Accurate dual-band GPS
  • +Tough titanium and sapphire
  • โˆ’Big and heavy on smaller wrists.
  • โˆ’Maps and navigation aren't as good as a Garmin's.
  • โˆ’The touchscreen is hard to use when wet or with gloves.
  • โˆ’Barely changed from the Ultra 3.

Ready to choose?

How we reached this verdict

We compared independent expert reviews with the manufacturer's specifications, then checked it's sold at a major retailer where you live. We don't test products ourselves.

Sources: Tom's Guide, TechRadar, TechRadar, manufacturer specifications.

Updated 19 Oct 2026How we decide