Duna AI Scan

Support · Duna AI Scan

Need help with Duna AI Scan? You're in the right place.

Contact

When emailing, please include:

Frequently asked questions

Scanning

Q: The camera screen is black.
A: Make sure you've granted camera permission in iOS Settings → Privacy & Security → Camera → Duna AI Scan. Force-quit and reopen the App.

Q: Document edges are not detected.
A: Place the document on a contrasting background, ensure even lighting, and hold the camera steady. The auto-detector works best with rectangular paper.

Q: How do I rescan a single page in a multi-page document?
A: Open the document → Edit → tap the page → Reshoot.

OCR & AI extraction

Q: OCR returns wrong text.
A: Improve lighting, get closer to fill the frame, and avoid glare. OCR currently supports English and Vietnamese best.

Q: "Review needed" badge shows on extracted fields.
A: The on-device AI is unsure about that value. Tap the field to review and edit.

Q: My device doesn't support Apple Intelligence — will OCR still work?
A: Yes. Apple Intelligence is only used for advanced field extraction (due dates, notes) on iPhone 15 Pro and newer. Basic OCR and tagging work on all iOS 17+ devices.

Vault & security

Q: I forgot my vault passphrase. How do I recover documents?
A: Passphrases cannot be recovered by design — Duna Labs never sees them. Documents encrypted with a forgotten passphrase are unrecoverable. We recommend using the device key mode (default), which is automatically synced via iCloud Keychain.

Q: Face ID prompts every time.
A: We use a 60-second grace window. If Face ID prompts every action, your device may have disabled biometric persistence after a recent reboot or passcode change. Restart the device.

Q: Vault documents disappeared after re-installing the App.
A: If you only used the device key mode and did not have iCloud Keychain enabled, the encryption key was lost when you deleted the App. Restore via iCloud backup, or future-proof by enabling iCloud Keychain (Settings → Apple ID → iCloud → Passwords & Keychain) before vaulting.

Sync

Q: My documents don't appear on my iPad.
A: Both devices must be signed in to the same Apple ID, have iCloud Drive enabled, and have launched Duna AI Scan at least once.

Q: How do I delete all synced data?
A: iOS Settings → Apple ID → iCloud → Manage Storage → Duna AI Scan → Delete Data.

Advertising

Q: Why am I seeing ads? I thought the app was private.
A: Banner ads (via Google AdMob) help keep Duna AI Scan free. They are clearly labeled and respect your App Tracking Transparency choice. No scan content is ever sent to AdMob or any advertiser.

Q: How do I see fewer / less-personalized ads?
A: iOS Settings → Privacy & Security → Tracking → Duna AI Scan → off. You'll still see ads, but they will not be personalized.

Subscriptions

Q: Is the app free?
A: Yes. The free tier includes core scanning with banner ads. Optional Pro and Business subscriptions are available on the App Store for advanced features.

Bug reports & feature requests

Email hoainam8x@gmail.com with subject: