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 15/27 signals at the lowest price point in this comparison and adds 24/7 stress that Fitbit lacks. Fitbit reads 17/27, adds ECG with AFib screening and works inside Google ecosystem (Pixel Watch, Google Maps, Google Wallet).
Amazfit
15/27API signals exposed
Zepp OS watch · partner API
vs
fitbit
17/27API 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. Body composition is a tie if you add an Aria scale to Fitbit — Amazfit has no scale of its own.
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 a Fitbit Aria scale for body composition
Amazfit+fitbit
Pick both if
- Amazfit on the wrist 24/7 for stress + sleep
- Fitbit Aria scale for body composition
- Most-budget multi-device combination in this comparison
FAQ
Frequently asked questions
Can I connect both Amazfit and Fitbit to MyBodyAI?
Yes. MyBodyAI merges signals from every connected source and uses richer-source-wins per field. Amazfit is built, waiting for vendor app approval, Fitbit is live via OAuth.
Which one covers more MyBodyAI signals?
Amazfit reads 15 of 27 tracked signals. Fitbit reads 17. The matrix above breaks the count down by category — they often win different categories.
Do the affiliate links change which device you recommend?
No. Recommendations on this page come from signal coverage and developer-API capability. Affiliate commissions never change the matrix, the pick-X-if cards, or your MyBodyAI subscription price.
What happens if I switch from Amazfit to Fitbit later?
Your MyBodyAI history is preserved per signal. New data starts arriving from Fitbit the moment you connect it. Disconnecting Amazfit pauses the old feed without deleting past data.
WHERE TO BUY
Check prices at the source
Direct links to each vendor's store. Some are affiliate.
- Amazfit Official store Check at Amazfit →
- Amazfit Official store 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.
Try MyBodyAI free →