Amazfit Bip 5 Unity vs Xiaomi Watch S3
Amazfit Bip 5 Unity (2024, listed at $99) and Xiaomi Watch S3 (2024, listed at $149) are both smartwatches, so the choice comes down to specifics.
Specs last updated · prices are list prices
Amazfit Bip 5 Unity
Big AMOLED smartwatch under $100 — surprisingly capable for daily fitness tracking.
Xiaomi Watch S3
Swappable magnetic bezels, dual-band GPS and a 466×466 AMOLED for under $150.
The verdict
On the numbers we track, Amazfit Bip 5 Unity wins on weight (33 g vs 44 g) and price ($99 vs $149); Xiaomi Watch S3 wins on battery life (15 days vs 11 days).
Bottom line: on raw specs the Amazfit Bip 5 Unity leads 2 to 1, but five spec categories are only a starting point. Match it to your phone, your main sport and your budget before you decide, or run the free quiz to see how each ranks for your answers.
Spec by spec
| Spec | Amazfit Bip 5 Unity | Xiaomi Watch S3 |
|---|---|---|
| Battery (rated) | 11 days | 15 days |
| Weight | 33 g | 44 g |
| List price | $99 | $149 |
| Water rating | 5ATM | 5ATM |
| Tracked features | 3 | 3 |
| Case size | 46 mm | 47 mm |
| Display | AMOLED | AMOLED |
| Works with | both iPhone and Android | both iPhone and Android |
| Listed best for | everyday wellness and gym and strength work | everyday wellness, gym and strength work and running |
| Released | 2024 | 2024 |
Trophy marks the better value on the five measurable specs. Battery is the manufacturer's rating, not our test. How we score is on the methodology page.
Feature overlap
Both have (3)
- built-in GPS
- blood-oxygen (SpO₂)
- AMOLED display
Only Amazfit Bip 5 Unity (0)
Nothing unique.
Only Xiaomi Watch S3 (0)
Nothing unique.
Which one should you pick?
Pick the Amazfit Bip 5 Unity if…
- You want to spend less: it lists for $50 less.
- You want a lighter watch: 33 g vs 44 g.
- You might switch phones: it works with both iPhone and Android, the Xiaomi Watch S3 only works with Android.
Skip it if…
- • You have a small wrist (under about 160 mm) — the 46 mm case we list is large (check whether a smaller size is sold).
Pick the Xiaomi Watch S3 if…
- You want fewer charges: about 15 days per charge vs 11 days.
- Your main use is running: it is listed for that and the Amazfit Bip 5 Unity is not.
- You might switch phones: it works with both iPhone and Android, the Amazfit Bip 5 Unity only works with Android.
Skip it if…
- • You have a small wrist (under about 160 mm) — the 47 mm case we list is large (check whether a smaller size is sold).
Frequently asked questions
Which has better battery life, the Amazfit Bip 5 Unity or the Xiaomi Watch S3?
The Xiaomi Watch S3 has the longer rated battery life: about 15 days per charge against 11 days. These are manufacturer ratings; heavy GPS, always-on display and cellular use will cut both.
Which is cheaper, the Amazfit Bip 5 Unity or the Xiaomi Watch S3?
The Amazfit Bip 5 Unity has the lower list price: $99 against $149 in our database. List prices change often, so check Amazon for today's price.
Do the Amazfit Bip 5 Unity and Xiaomi Watch S3 work with iPhone and Android?
Yes, they have the same phone support: both iPhone and Android.
Which is better for swimming, the Amazfit Bip 5 Unity or the Xiaomi Watch S3?
Neither has an edge on water rating: both are rated 5ATM. 5ATM is suitable for showering and pool swimming, but not for high-speed water sports or diving.
Not sure either is right for you?
Nine questions about your phone, sport, wrist and budget, scored against all of our watches with the reasoning shown.
Take the free quizWhere each one ranks #1 in our quiz
Amazfit Bip 5 Unity
It is not the top pick for any standard quiz profile.