Both are dive watches rated to 100 m. The Garmin lasts a week, the Apple has eSIM.
Short answer
Garmin Descent G2 - a dive computer, up to 10 days, works with Android, cheaper. Apple Watch Ultra 3 - eSIM and 5G RedCap, dual-frequency GPS, SpO2, 64 GB.
Key differences
| Spec | Garmin Descent G2 | Apple Watch Ultra 3 49mm GPS + Cellular |
|---|---|---|
| Display | 1.2", AMOLED, 390×390 | OLED, 422×514 |
| Chip | — | Apple S10 |
| Memory | 4 GB | 64 GB |
| Battery life | up to 10 days | up to 42 h |
| Connectivity | Bluetooth Smart, ANT+ | 5G RedCap, LTE, eSIM |
| Navigation | GPS, GLONASS, Galileo | GPS, GLONASS, Galileo, QZSS, BeiDou (L1 + L5) |
| NFC | yes | yes |
| Sensors | heart rate, barometer, compass, gyroscope, temperature | heart rate, SpO2, barometer, compass, gyroscope, temperature |
| Protection | 100 m | 100 m / IP6X / EN13319 |
| OS | — | watchOS 26 |
| Compatibility | iPhone, Android | iPhone 11 / iPhone SE 2 / iOS 26 |
| Dimensions, weight | 45.5×45.5×15.2 mm, 65 g | 49×44×12 mm, 61.6 g |
| Price | current prices | current prices |
Specs come from the device pages on Smartphone.ua.
Battery life
Up to 10 days vs up to 42 h.
Protection
100 m vs 100 m, IP6X and EN13319.
Compatibility
Garmin - iPhone and Android. Apple - iPhone only.
Verdict: who should buy which
- Diving and battery life - Garmin Descent G2.
- A smartwatch with eSIM - Apple Watch Ultra 3.
FAQ
How much storage?
4 and 64 GB.
How heavy are they?
65 and 61.6 g.
Which is cheaper?
The Garmin Descent G2.