Great question!

The app will save your library and content "My Library" history data for you, so even if you delete the app, that data is still available. You can re-install the app and sign in again to your Heroic account – all library PNs, +1s, highlights, and content history will still be there!

It is necessary to use Heroic while online (on WiFi or mobile data) so that your library can sync with our system.

Please note: Of course, if you've deleted your account fully, we are not able to reactivate your library or "My Library" stats.