A symptom journal that stays on your phone
For endometriosis and adenomyosis. Tap a level for the day, start a flare from the Lock Screen, mark period days and log doses. Days you miss can be filled in later from Apple Health.
Coming in an update: change one thing, like less dairy or a new stretch, and compare the same cycle days before and during, with anything else that changed listed next to the result.
iPhone · iOS 18 or later
On this phone only
No account and no server. Nothing you log is sent anywhere, and there are no analytics. Read the privacy policy.
Privacy mode
Everyday words on screen, in notifications and on the Lock Screen, such as Note for Flare. The Home Screen icon can change to Journal.
Backups you keep
An encrypted backup file, with a password Tidebook never keeps, or CSV files to open anywhere. They go only where you send them.