What wearables do you support?

Joise works with any wearable that writes sleep data to Apple Health — including Apple Watch, Oura, Garmin and Whoop.

Joise reads from Apple Health rather than connecting to each brand directly, so if your device's own app syncs sleep to Health, Joise can use it.

Sleep data is required. Without it there's nothing to build a forecast from.

A note on Fitbit: Fitbit doesn't write sleep to Apple Health on its own. If you wear a Fitbit you'll need a third-party bridge app to get sleep into Health first.