Apple Watch Series 10 (46 mm, GPS, aluminium) / Samsung Galaxy Watch7 44 mm Bluetooth

The aluminium version uses Ion-X glass; the titanium versions have sapphire crystal.

Up to 2000 nits and down to 1 nit. Apple says the wide-angle OLED looks up to 40% brighter when viewed at an angle, making the watch easier to read without raising the wrist.

The 2000-nit peak helps readability in sunlight; using the always-on display shortens battery life.

The electrical sensor enables ECG recordings and the optical sensor continuous heart rate. Availability of health features varies by country.

Suitable for shallow-water activities such as swimming, not for scuba diving or high-velocity water sports. The depth gauge is for snorkelling down to 6 metres.

This version has no cellular connection, so calls and data away from the phone need Wi-Fi. Location uses only the L1 band; there is no dual-frequency GPS.

Fast charging uses the included magnetic fast charger to USB-C cable; the adapter is sold separately.

A fast wireless charging puck is in the box, but no wall adapter.

An iPhone is required for setup and use; it does not work with Android phones.

The L5 band helps separate signals reflected by tall buildings and trees; dual-frequency mode can increase battery use.

Availability of ECG and blood pressure depends on country and paired phone; blood pressure measurement is not offered in the US.

Energy Score turns sleep, activity and heart data into a daily readiness score; AGEs Index is experimental and not for diagnosis.

This version has no cellular connection; calls and notifications come through the paired phone.

5ATM describes water resistance suitable for surface swimming; it is not for diving or high-speed water sports.