Include your app version (Settings → Version) and a short description of the issue. Screenshots help a lot.
On your device only. If you enable iCloud Sync, it syncs through your personal iCloud account. We never see it. See the privacy policy.
In iOS: open Settings → Apple ID → Subscriptions → Zuko → Cancel. Purchases are handled by Apple, not by us.
Reinstall, open the paywall, and tap Restore Purchase. As long as you use the same Apple ID, your Pro unlock returns.
Our detector uses heuristics and can miss edge cases. Add it manually via the + button. If the merchant format is broadly common (and we're missing it), send us a sample receipt — we'll tune the parser.
Merchants change their flows. Email us the service name and what you had to do differently and we'll update the guide.
No. We never touch your accounts. Every cancellation is walked through by you, with Zuko guiding the steps.