Amazfit
Pick Amazfit if
- Price is the binding constraint
- You like long battery on a consumer watch
- 24/7 stress index matters to you
Amazfit vs Fitbit
Both are consumer-grade daily-wear watches. Amazfit reads 16/27 signals at the lowest price point in this comparison and adds 24/7 stress that Fitbit lacks. Fitbit reads 16/27, adds ECG with AFib screening and works inside Google ecosystem (Pixel Watch, Google Maps, Google Wallet).
Amazfit
16/27API signals exposed
Zepp OS watch
vs
fitbit
16/27API signals exposed
Daily-wear watch + scale
QUICK VERDICT
If price is the binding constraint, Amazfit gives you most of the daily-health signal stack at a fraction of Fitbit's cost. If you're already in the Google ecosystem or want ECG with AFib screening on the wrist, Fitbit is the better fit. Neither one measures body composition on its own — for body fat and muscle mass you'd pair either with a Withings scale.
COVERAGE BY CATEGORY
Where each brand actually wins
Per-category breakdown of API signals.
SIGNAL BY SIGNAL
The full matrix
| Signal | Amazfit | Fitbit |
|---|---|---|
| Heart & Vitals | ||
| Resting HR | ✓ | ✓ |
| HRV | ✓ | ✓ |
| SpO2 | ✓ | ✓ |
| Respiratory Rate | ✓ | ✓ |
| Skin Temperature | — | ✓ |
| Body Temperature | — | — |
| Blood Pressure | — | — |
| ECG · AFib | — | ✓ |
| Sleep | ||
| Sleep duration | ✓ | ✓ |
| Sleep stages | ✓ | ✓ |
| Sleep score | ✓ | — |
| Activity | ||
| Steps | ✓ | ✓ |
| Active minutes | ✓ | ✓ |
| Calories | ✓ | ✓ |
| Activities | ✓ | ✓ |
| Floors climbed | — | ✓ |
| Distance | ✓ | ✓ |
| Fitness & Recovery | ||
| VO2max | ✓ | ✓ |
| Training load | ✓ | — |
| Recovery / Readiness | ✓ | — |
| Body Battery | — | — |
| Stress (continuous) | ✓ | — |
| Cardiovascular age | — | — |
| Body Composition | ||
| Weight | — | ✓ |
| Body fat % | — | — |
| Muscle mass | — | — |
| Hydration | — | — |
Verified against vendor developer documentation.
WHICH ONE FOR YOU
Pick the one that matches your priority
fitbit
Pick Fitbit if
- You're already in the Google ecosystem
- ECG + AFib screening matter on the wrist
- You want weight + BMI from the Fitbit Aria Air scale
Amazfit+fitbit
Pick both if
- Amazfit on the wrist 24/7 for stress + sleep
- Withings scale for body composition
- Lowest-cost multi-device combination in this comparison
FAQ
Frequently asked questions
Should I choose Amazfit or Fitbit?
For most people it is one or the other. Both are daily-wear devices that track the same core things, heart rate, sleep and activity, so wearing both is redundant. Use the matrix above to pick the one that wins the categories you care about.
Which one tracks more health signals?
Amazfit tracks 16 of the 27 signals I compare, Fitbit tracks 16. The matrix above breaks it down by category, and they often win different categories.
Is it worth switching from Amazfit to Fitbit?
Only if Fitbit wins the categories you actually care about. If you already own Amazfit and it covers your main goal, the upgrade is rarely worth it. The matrix above shows exactly what changes.
How did you compare Amazfit and Fitbit?
From each brand's official spec sheets and support pages, cross-checked against independent reviews like DC Rainmaker and The Quantified Scientist and peer-reviewed accuracy studies. Signal-level edge cases are noted in the matrix, not hidden behind a single check mark.
WHERE TO BUY
Check prices at the source
Direct links to each vendor's store. No affiliate links.
- Amazfit Official store Check at Amazfit →
- fitbit Official store Check at Fitbit →
MORE COMPARISONS
Explore other pairs
OPTIONAL — IF YOU WANT MORE
Want one place that merges both feeds?
MyBodyAI merges these signals into Biological Age, Recovery and 9 other indices.
Start your 7-day trial →