Smartwatches · Samsung
Samsung Galaxy Watch 5- Case size:
- 40 mm
- Display type:
- AMOLED
- Reference price:
- SAR 954
Samsung Galaxy Watch 5 vs Amazfit T-Rex 3: which one suits you?
The two differ in 3 of the specs we have recorded, and the Samsung Galaxy Watch 5 is cheaper by SAR 118 (prices checked 5 Nov 2026).
Which one should you choose?
- Paying less: cheaper by SAR 118
Choose the
Amazfit T-Rex 3 if you care about:- Charge less often through the week (27 days vs 1 days)
- Lower weight: 68 g vs 190 g
The deciding difference here: battery life and weight and price.
Compares recorded specs; a missing spec does not mean the feature is absent.
Key differences
Case size
40 mm48 mmBattery life
1 days✓ 27 daysWeight
190 g✓ 68 g
Specifications side by side
18 of 18 specs
Scroll the table sideways to see the rest.
| Spec | | |
|---|---|---|
| Reference price | SAR 954 | SAR 1,072 |
| Battery life | 1 days | ✓ 27 days |
| Phone compatibility | Smartphone | — |
| Built-in GPS | Yes | Yes |
| Cellular (LTE/eSIM) | Yes | Yes |
| Case size | 40 mm | 48 mm |
| Display size | — | 1.5 in |
| Water resistance | — | 10 ATM |
| Case material | Resin | — |
| Weight | 190 g | ✓ 68 g |
| Display type | AMOLED | AMOLED |
| ECG | — | No |
| Contactless payment (NFC) | — | Yes |
| Heart-rate tracking | Yes | Yes |
| Blood oxygen (SpO2) | Yes | Yes |
| Release year | — | 2024 |
| Dimensions | 14 x 0.5 x 3.5 centimeters cm | — |
| dust resistance rating | — | IP68 |
| App control (Wi-Fi) | — | Yes |
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Before you buy
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Direct comparison questions
What is the difference in battery life between the Samsung Galaxy Watch 5 and the Amazfit T-Rex 3?
Battery life is higher on the Amazfit T-Rex 3: 27 days vs 1 days on the Samsung Galaxy Watch 5. If this spec is your priority, the difference favours it.
What is the difference in cellular (LTE/eSIM) between the Samsung Galaxy Watch 5 and the Amazfit T-Rex 3?
No difference here: cellular (LTE/eSIM) is Yes on both.
What is the difference in built-in GPS between the Samsung Galaxy Watch 5 and the Amazfit T-Rex 3?
No difference here: built-in GPS is Yes on both.
What is the difference in case size between the Samsung Galaxy Watch 5 and the Amazfit T-Rex 3?
Samsung Galaxy Watch 5: 40 mm; Amazfit T-Rex 3: 48 mm. A higher value is not necessarily better for you.