Sunfold has no account and no sign-in, so there is nothing to recover and no password to reset. If something is wrong, write and describe what you saw.
We answer every message. Please include your iPhone model and iOS version — it makes most problems obvious straight away.
On your iPhone, and nowhere else. Settings → Export as CSV gives you a copy; Settings → Delete all data removes everything at once. Deleting the app removes the rest.
Subscriptions live on your Apple ID, not with us. Open the App Store, tap your photo, then Subscriptions to change or cancel. Restoring a purchase on a new device: Sunfold Pro → Restore.