On your phone, and nowhere else.
Tend does not sync. Your readings, records, and notes stay on the iPhone you wrote them on, and the only other copies are your iPhone's own backups and the ones you make on purpose. The whole policy is short enough to read, and it is on this site and in the app.
Your record should outlive any app, including this one. A spreadsheet of your readings, and the whole of Tend as one file a new phone can read back in: both free, always. With Tend Complete, a handoff pack gathers the essentials in your own words as a PDF for whoever helps you. Each is made on the phone and goes wherever you send it.
- Storage
- Your iPhone only. No server of ours, and Tend puts nothing in iCloud. Your iPhone's own backup, to iCloud or a computer, may include Tend along with everything else on the phone; that is set in the phone's settings. A visit you add to your calendar goes wherever that calendar keeps its entries.
- Sign-in
- None. There is nothing to create and nothing to hand over.
- Apple Health
- Off unless you turn it on. Read-only, and only when you ask: blood pressure, resting heart rate, waist and cardio fitness; your steps, for a habit that counts them; and, on the You page, your date of birth, sex, blood type, height and wheelchair use. Nothing is written back.
- Your data
- A spreadsheet or an archive, any time, free. Delete everything in one place, with no undo.