We read every message.
Email tv5138885@gmail.com with what happened and which iPhone or iPad you were using. If something went wrong with a specific document, tell us what you were doing when it did — you never need to send us the document itself, and we would rather you did not.
On your device, in the Files app under Simply PDF. Nothing is uploaded. You can open that folder in Files and copy documents out at any time.
Settings → Subscription → Manage subscription, which opens Apple's own subscription screen. Cancelling takes the same few taps as subscribing — that is one of our written promises.
Yes. Redaction destroys the marked areas rather than covering them, and it writes a new document to do it. The pages you marked become pictures, so their text cannot be selected, searched or read aloud any more. What it cannot reach are copies you already shared, printed, or that are in a backup — the app says so before you commit.
Settings → Subscription → Restore purchases. Your purchase lives in your App Store account, so it comes back on a new device without an account of ours.