Support — Android

Help for PhotoDiff on Google Play. Most questions are answered below — for anything else, we read and answer every email.

• Why does the app never ask for photo permission? It does not need one. PhotoDiff uses the Android system photo picker, which runs outside the app and hands back only the pictures you tapped. The app cannot see the rest of your gallery.
• Where are my photos and comparisons kept? In PhotoDiff’s own private storage on your phone. They are not uploaded, not added to your gallery, and not visible to other apps.
• How do I line two photos up? Add both photos, then use auto-align — the app finds faces in the pictures and uses the eye positions as alignment points. You can nudge, rotate, and scale by hand afterward.
• Does the app recognise who is in my photos? No. It detects that a face is present and where, so it can align the pictures. It does not identify anyone, and nothing derived from a face is saved or sent anywhere.
• Can I hide faces before sharing? Yes — turn on the mosaic option and the detected faces are blurred in what you view and export.
• How do I get my comparison out? Tap export and pick a destination from the Android share sheet — gallery, messages, or any app you like.

PhotoDiff is a paid app bought once on Google Play. There are no in-app purchases and no subscription, so there is nothing to restore and nothing to cancel.

• Reinstalling on a new phone: sign in to the Google account you bought with, then Google Play → profile icon → Manage apps & device → Library, and install PhotoDiff. You are not charged again.
• Order history and refunds: Google Play → profile icon → Payments & subscriptions → Budget & order history, or play.google.com/store/account. Refunds follow the Google Play refund policy.
• Redeeming a promo code: Google Play → profile icon → Payments & subscriptions → Redeem code.

Delete individual photos, comparisons, and groups inside the app. To remove everything at once, uninstall PhotoDiff or clear its data from Android Settings → Apps → PhotoDiff → Storage. Because nothing is stored on a server, that is the whole of it.

• Auto-align did not find a face: it needs both eyes reasonably visible. Try a less angled photo, or align by hand.
• A photo will not import: very large or unusual formats can fail. Try exporting the image from your gallery app first, then adding the copy.
• The app crashes or will not open: force-stop it from Android Settings → Apps → PhotoDiff, then reopen. If it persists, email us your device model and Android version.

Found a bug, have a feature idea, or anything else on your mind? Email us and we'll get back to you as soon as we can. Including your device model and Android version helps.