The file, always.
With or without sync, any run comes in by uploading the file your watch downloads. It is your data: you download it, you upload it, you ask nobody.
Watches and sync
Your runs arrive on their own from the watch and your plan shows up on its calendar. This is what works today, brand by brand, and what is on the plan.
| Watch | Today | How |
|---|---|---|
| Garmin | Yes, both ways | Through Intervals.icu: your runs come in and your plan shows up on the Garmin calendar |
| COROS | Yes, both ways | Through Intervals.icu |
| Suunto | Yes, both ways | Through Intervals.icu |
| Polar | Yes, your runs come in | Through Intervals.icu |
| Wahoo and Zwift | Yes, your activities come in | Through Intervals.icu |
| Apple Watch | With an export app | A third-party app (HealthFit, for instance) exports the file; you upload it or send it to Intervals.icu |
| Any watch | Always | You will have to upload the .fit or .tcx file from your phone |
No Strava, and why.
Strava's terms forbid feeding your data to an AI. Since the coach is one, we do not connect to Strava: your runs arrive from your watch or from its file.
Garmin direct, when they reopen.
Garmin has paused new applications to its developer programme. Meanwhile Intervals.icu bridges both ways. We will ask for direct access the day they reopen.
What is on the plan.
Polar, Oura and WHOOP directly, and an app for the Apple Watch. We say it here so you do not find out later.