Stridee

Stridee is a unified API that normalizes fitness data across wearable devices from different vendors into a single, consistent format. If you're building an app that needs to pull activity data from a Garmin watch, a COROS unit, and an Apple Watch, then push structured workouts back to each device, Stridee handles that translation layer so you don't have to build integrations yourself.

The problem it solves is familiar to anyone who has tried to build on top of wearable data. Each vendor has its own API, its own data format, its own quirks. A running workout from Garmin looks different than the same workout from Polar. Aggregating that data means writing and maintaining integration code for every device you want to support, and writing back is even harder because each watch expects workouts in its native format. Stridee abstracts that complexity.

On the read side, you get normalized JSON summaries with canonical FIT files. Activities, wellness data, and per-second streams all come through in a consistent structure regardless of which device recorded them. On the write side, you can push structured workouts with warmups, intervals, cooldowns, and targets for pace, power, or heart rate. Stridee encodes those into each device's native format automatically, so a single workout definition works across every supported watch.

The architecture is event-driven through webhooks. When new activity data arrives from a connected device, Stridee fires a webhook to your endpoint. There's a 72-hour retry backoff for failed deliveries and stored event replay so you can catch up if your service goes down. FIT file downloads come through signed URLs, keeping the data transfer clean and secure.

Current device support covers Garmin across the Forerunner, Fenix, Epix, Venu, and Edge lines, COROS including PACE, APEX, and VERTIX, Apple Watch via HealthKit, Wahoo across ELEMNT, RIVAL, and KICKR, Polar spanning Vantage, Grit X, and Pacer, and Strava for full history import. The roadmap includes Suunto, Whoop, Oura, Fitbit, Google Health Connect, Samsung Health, Zwift, and Peloton.

Stridee is currently in private beta launching September 2026, with only 50 founding developer slots available. Pricing is a 20 dollar one-time founding deposit that converts to your first month, then 20 dollars per month flat. There's no per-user pricing, which means you pay the same whether you have 10 athletes or 10,000. That flat rate positions it well for apps expecting to scale without costs scaling alongside.