Open Profile › Restore purchases. Make sure you are signed in to the same Google account (Android) or Apple ID (iPhone) you bought with. If Pro still doesn't return, write to us and include the support code.
Subscriptions are managed by the store you bought from. On Android, open Google Play › Subscriptions. On iPhone, open Settings › your name › Subscriptions. The app's Profile › Manage subscription row takes you there. A lifetime purchase never renews, so there is nothing to cancel.
They are kept on your phone, and the app also keeps a private backup that is not tied to your name. Profile › Back up now saves a copy at any time.
The app reads aloud with the voices installed on your phone. Open a chapter, tap the audio options, and pick a voice. Your phone's settings can add more voices.
Follow the steps on Delete your account and data. You can do it from the app or by email.
Read what the app collects and why in the privacy policy.