One key per app. Type it into the app once and it stays unlocked — the app never asks again.
No keys on this account yet. If you have just ordered, they land here as soon as the payment clears.
How to unlock an app. Open the app, find Unlock in its menu, and type the key for that app.
Each key covers two devices — your phone and your tablet, say. A reinstall on a device you already
activated does not use a second one.
