Your data: cloud, backups and importing
Where your history lives, how to get it out, how to bring it in.

The cloud, and who wins
Sign in with Google and your history is saved to your account on its own: change phone, sign in, it is all there. The phone always wins: if the cloud and this phone disagree, this phone wins and you are never asked. Anything edited on novastra.fit shows up in the app when you open it.
The full backup
In Profile → Your data you can save a JSON with everything: workouts, routines, programs, measurements, records and settings. And it can now be restored, which is what makes that file a real backup. Restoring replaces what is on the phone, and you are told first, with its date and how many workouts it holds.
Coming from Strong or Hevy
Export your history from that app (both give you a CSV) and bring it in with «Bring data from a file». It is added to yours: nothing is deleted. Exercises not in the catalogue are created as yours with their original name, and workouts already on the phone are skipped, so importing twice duplicates nothing.

Getting data out, and deleting it
There are three spreadsheet CSVs (sets, workouts and measurements), Health Connect so your workouts show on your watch or in Google Fit, and account deletion, which really does take everything off the server.
More on How the app works
The first five minutes
Pick a plan, train, see what happens at the end. That is all.
Inside the workout screen
The one you will use most, and the one hiding the most.
Routines, programs and other people
What each one is, where they come from, what sharing actually sends.
What each chart is looking at
Progress has six things and each answers a different question.
Cosmos: what is shared and what is not
Box by box, and what never leaves even if you tick everything.
This is general information written from the training literature, not medical advice or a personalised plan. If you take medication, have a health condition or something genuinely hurts, the person to ask is a healthcare professional.