Another watch maker's API
aifitnessapi.com| Alternative | Best for | Watch out |
|---|---|---|
| Terra, ROOK, Spike, Validic | Polar beside other brands, one integration | Per-user or per-source fees; check each vendor's Polar row |
| Thryve | Polar through a shared OAuth client | No historic Polar data in its table |
| Open Wearables | Self-hosting | You still register your own AccessLink client |
| Sahha | Phone-first apps | Only what reaches Apple Health or Health Connect |
| Polar mobile SDK | Live ECG, acceleration and heart rate in your app | No cloud history |
| COROS, Suunto, Garmin | Users who can choose their watch | A different brand, a separate integration each |
Last verified November 4, 2026 · Source: Polar API Alternatives: Aggregators, Other Watch APIs and the Polar SDK
via AIFitnessAPI: Polar API Alternatives: Aggregators, Other Watch APIs and the Polar SDK ↗ — a free reference from AIFitnessAPI. This widget shows whatever the source page says today, so it changes when we update it.