Galaxy Watch 9 vs Xiaomi Watch S5
Galaxy Watch 9 and Xiaomi Watch S5 are watches both released in 2026 by different brands, with overlapping phone compatibility. This comparison separates the catalog's listed specifications from missing information and approximate values. It covers 18 fields, including 9 exact differences; it does not choose a winner.
Specifications side by side
| Field | Galaxy Watch 9 | Xiaomi Watch S5 |
|---|---|---|
| Release year | 2026 | 2026 |
| Case sizes | 40 / 44 mm | 46 mm |
| Display | Super AMOLED, Always-On | AMOLED 1.48" (2,500 nits peak) |
| Brightness | 3000 nits | 2500 nits |
| Battery, as listed | Up to 30 hours (AOD) | 12 days (user-measured) (approx.) |
| Operating system | Wear OS + One UI Watch | Xiaomi HyperOS 3 |
| Phone compatibility | Android | Android, iPhone |
| Cellular connection | eSIM · LTE | None (eSIM China-only) |
| Water rating | 5ATM + IP68 | 5ATM |
| Glass | Sapphire | Not listed |
| Case material | Aluminum | Aluminum |
| GPS | Dual-frequency GNSS | Dual-frequency GNSS |
| Maps | No | No |
| Payment system | Samsung Wallet | None listed |
| Plan requirement | Not required | Not required |
| Listed sensors and features | Sleep apnea, Body composition (BIA), Blood pressure trend, ECG, HRV, SpO2, Skin temperature | Sleep apnea, HRV, SpO2, Skin temperature |
| Safety features | Fall detection, SOS calling | Fall detection, SOS calling |
| Hardware flashlight | No | No |
"Not listed" means the catalog has no usable value for that field. It does not mean the watch lacks the feature. Approximate values stay visible but do not support the difference count or numeric deltas.
Where they differ
- Case sizes: Galaxy Watch 9 lists 40 / 44 mm; Xiaomi Watch S5 lists 46 mm. Keep the variant qualifications when comparing an individual model; this row describes the catalog entry rather than every configuration.
- Display: Galaxy Watch 9 lists Super AMOLED, Always-On; Xiaomi Watch S5 lists AMOLED 1.48" (2,500 nits peak).
- Brightness: Galaxy Watch 9 lists 3000 nits; Xiaomi Watch S5 lists 2500 nits. The listed values are 500 nits apart.
- Operating system: Galaxy Watch 9 lists Wear OS + One UI Watch; Xiaomi Watch S5 lists Xiaomi HyperOS 3. The listed software descriptions are not a guarantee of the software version currently installed on an individual watch.
- Phone compatibility: Galaxy Watch 9 lists Android; Xiaomi Watch S5 lists Android, iPhone.
- Cellular connection: Galaxy Watch 9 lists eSIM · LTE; Xiaomi Watch S5 lists None (eSIM China-only). Variant wording is retained. A cellular specification alone does not confirm activation with your mobile carrier.
- Water rating: Galaxy Watch 9 lists 5ATM + IP68; Xiaomi Watch S5 lists 5ATM.
- Payment system: Galaxy Watch 9 lists Samsung Wallet; Xiaomi Watch S5 lists None listed.
- Listed sensors and features: Galaxy Watch 9 lists Sleep apnea, Body composition (BIA), Blood pressure trend, ECG, HRV, SpO2, Skin temperature; Xiaomi Watch S5 lists Sleep apnea, HRV, SpO2, Skin temperature. This compares the listed feature names, not measurement accuracy, clinical usefulness or availability in a particular country.
Where they are the same
- Both list release year: 2026.
- Both list case material: Aluminum.
- Both list gps: Dual-frequency GNSS.
- Both list maps: No.
- Both list plan requirement: Not required.
- Both list safety features: Fall detection, SOS calling.
- Both list hardware flashlight: No.
Which one fits you
Galaxy Watch 9 is listed as a watch compatible with Android. Start with that phone requirement before comparing the other rows. The exact differences above are a way to identify which listed specifications matter to your use, not evidence that one model is better in every respect.
Xiaomi Watch S5 is listed as a watch compatible with Android, iPhone. Start with that phone requirement before comparing the other rows. The exact differences above are a way to identify which listed specifications matter to your use, not evidence that one model is better in every respect.
Information is missing on at least one side for: Glass. Those rows are excluded from the exact difference count.
Related pages
- Galaxy Watch 9 specifications
- Samsung watches
- Xiaomi Watch S5 specifications
- Xiaomi watches
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- All pair comparisons