What you need to know
Rotation is an iPhone app for following a training split in order instead of by weekday. It needs iOS 26 or later.
The card shows the session that's up next. Swipe right or tap the checkmark when you trained, and swipe left or tap the X for a rest day. If you trained something else, tap Did something else and pick it. The rotation continues from whatever you log.
To rename, reorder, add, or remove sessions, or to change the daily check-in time, open Settings from the gear button.
At your check-in time, Rotation sends a notification asking whether you went, and you can answer Yes or No right on it. If it doesn't arrive, turn on notifications for Rotation in the iOS Settings app.
There is no account. Your rotation and check-ins stay on your iPhone and are included in your iPhone backups. Deleting the app deletes them.