Closed Loop
Integrations
Closed Loop works from the data you already collect. Connect what you use; nothing here is required except an iPhone.
| Integration | Status | What it does |
|---|---|---|
| Apple Health | Available | Reads your workouts, heart rate and daily steps. Works with any app or watch that writes to Apple Health. |
| Apple Watch | Available | Sends structured workouts to the watch: warm-up, intervals, recoveries and cool-down, with heart-rate or pace targets. |
| WHOOP | Available | Reads recovery, sleep, strain and workouts. Recovery feeds the daily readiness call. |
| Garmin | Beta | Reads your Garmin activities using your own Garmin personal API key. Activities already seen through Apple Health or WHOOP are not counted twice. |
| intervals.icu | Beta | Sends your planned workouts to intervals.icu, which passes them on to a Garmin watch. |
| Google Calendar | Available | Reads when you are busy, to suggest a time that fits your day. |
| Weather | Built in | Forecast for the best hour to run, and heat correction for the runs you have done. No account needed. |
| GPX and TCX files | Available | Import an activity recorded anywhere. |
| Calendar export | Available | Export the plan as a calendar file. |
| Sign in with Apple, Google | Available | No separate password. |
How the pieces fit together
Apple Watch runners
Apple Health and Apple Watch are enough. The plan goes to the watch and the run comes back.
WHOOP wearers
Add WHOOP for recovery and sleep. Runs seen by both the watch and the strap are merged into one.
Garmin runners Beta
Connect Garmin to bring activities in, and intervals.icu to send workouts out. Both are in beta.
Apple Health, Apple Watch, Garmin, WHOOP, Google Calendar and intervals.icu are trademarks of their respective owners. Closed Loop is not affiliated with or endorsed by Apple, Garmin, WHOOP, Google or intervals.icu.
Join the private beta
Closed Loop is invitation-only while we test it with a small group of runners. Email us and tell us what you are training for.
enroll@halo-design.netiPhone with iOS 17 or later. Installed through Apple TestFlight. Free during the beta.