Most Calculator Hide App issues have simple fixes. Before you panic or reinstall, work through this guide — the problem is almost certainly one of the issues below.
Problem 1: The Vault Appears Empty
This is the most common issue and almost always caused by a storage permission change — not data loss.
Fix: Go to Settings > Apps > Calculator Hide App > Permissions > Storage. Set it to “Allow access to all files” or “Allow all the time.” Reopen the app and enter your PIN. Your vault should reappear.
If this doesn’t work, see the full guide on recovering disappeared photos.
Problem 2: The App Crashes on Opening
Fix in order: First, update Calculator Hide App from Google Play. If it’s already up to date, clear the app cache — Settings > Apps > Calculator Hide App > Storage > Clear Cache. Reopen the app.
If crashing continues after a cache clear, try clearing app data (Settings > Apps > Calculator Hide App > Storage > Clear Data). Warning: clearing data resets the app. Only do this if you have cloud backup enabled and are prepared to restore your vault.
Problem 3: Wrong PIN — Can’t Get In
If you’re certain your PIN is correct but the app won’t accept it, check whether Caps Lock or number lock on your keyboard is behaving unexpectedly. Try entering the PIN very slowly.
If you’ve genuinely forgotten your PIN, use the Forgot Password option on the calculator screen. For step-by-step recovery instructions, see the password recovery guide.
Problem 4: Photos Won’t Import
If tapping ”+” and selecting photos does nothing, it’s a permissions issue. Grant storage permissions as described in Problem 1. On Android 14 and above, Calculator Hide App needs specific media permissions — “Photos and Videos” access, not just general storage.
Also see Calculator Hide App compatibility with Android 14 and 15 for version-specific permission changes.
Problem 5: App Hider Not Showing Installed Apps
On Android 14 and above, apps need explicit permission to query the full list of installed packages. Update Calculator Hide App from Google Play — the latest version includes this permission. After updating, the App Hider section should display all installed apps correctly.
Problem 6: Biometric Unlock Not Working
After an Android update, biometric permissions for apps sometimes reset. Go to Settings > Apps > Calculator Hide App > Permissions and re-enable biometric/fingerprint access. Then inside Calculator Hide App, go to Settings > Security > Biometric Unlock and re-enable it there too.
Problem 7: App Running Very Slowly
A slow Calculator Hide App is usually caused by a very large vault with many high-resolution files, or low available storage on your device. Free up device storage by moving files out of other apps, and consider whether any vault files can be exported or deleted.
When to Reinstall
Reinstalling is a last resort — not a first step. Before reinstalling, ensure you have cloud backup enabled and run a fresh backup. Then reinstall from Google Play and restore from your backup. See how to restore Calculator Hide App after reinstalling.
Frequently Asked Questions
Will fixing these issues delete my hidden photos?
Clearing the cache never deletes your photos. Clearing app data may disconnect the app from its encrypted folder — but the files remain on the device. Reinstalling without a backup is the only action that risks permanent loss.
Who do I contact if nothing works?
Contact Calculator Hide App support via the Help Center with your device model, Android version, and a description of the issue. Include any error messages you see.