Vault - Privacy Policy
Calc Vault Privacy Policy
Effective date: 29 October 2026 · App: Calc Vault: Hide Photos & Apps (com.dev.calculator.vault)
This policy explains what information Calc Vault ("the app", "we", "us") handles, why, and the choices you have. The app is made by Saffron Applications. Questions: saffronapplications@gmail.com.
1. Information that stays on your device
| What | How it is handled |
|---|---|
| Your PIN, pattern and fake (decoy) PIN | Stored on the device in hashed form. Never sent anywhere. |
| Hidden photos, videos, audio and documents | Moved into a hidden folder on your device's storage (.hideHiderAblum) so they no longer show in your gallery. Files are moved, not encrypted. They are not uploaded unless you turn on Google Drive backup. |
| Private notes, hidden contacts, private browser bookmarks and history | Stored only in the app's private storage on your device. |
| Intruder selfie photos (optional, off by default) | Taken with the front camera only after wrong PIN attempts, if you turn the feature on. Saved only on your device; never uploaded. |
| Security question / quiz answers for password recovery | Stored only on your device. |
| List of installed apps; notifications you choose to hide | Used on the device by App Lock, Hide apps and Hide notifications. Never sent anywhere. |
Uninstalling the app removes its private data. Hidden files stay in the hidden folder on your phone until you unhide or delete them, so unhide them (or back them up) before you uninstall or reset your phone.
2. Permissions and why the app asks for them
| Permission | Why |
|---|---|
| All files access | To move the files you choose into the vault's hidden folder and back out again. |
| Usage access, Display over other apps | Optional. Lets App Lock know which app is opened and show the lock screen over the apps you choose to lock. |
| Accessibility service | Optional. Used only by "Lock WhatsApp chats" to detect when a WhatsApp chat screen opens so the lock can be shown. It does not read, collect or store your messages or any screen content. |
| Notification access | Optional. Used only by "Hide notifications" to remove notifications from apps you choose and keep them inside the vault on your device. |
| Query installed apps | To list your apps in App Lock and Hide apps. |
| Camera | Optional. For the in-vault camera and the intruder selfie. |
| Contacts | Optional. To hide the contacts you select and restore them later. Contacts are not uploaded. |
| Fingerprint / biometrics | Optional. To unlock or recover access with your fingerprint. Biometric data is handled by Android and never reaches the app. |
| Device administrator | Optional ("File loss protection"). Helps prevent the app being uninstalled by someone else, which would put your hidden files at risk. You can turn it off in the app's settings. |
| Internet, network state, notifications | For ads, analytics, Google Drive backup, and to show reminders and the App Lock service notification. |
3. Information collected by third-party services
The app uses the following services. They may collect information as described in their own privacy policies.
| Service | Information | Purpose |
|---|---|---|
| Google AdMob and its mediation partners: AppLovin, Meta Audience Network, Pangle, InMobi, Liftoff (Vungle) | Advertising ID and other device identifiers, approximate location (derived from IP address), app interactions with ads, diagnostics | Showing ads, measuring them, preventing fraud. Where the law requires it (for example in the EEA, UK and some US states) you are asked for consent first. |
| Google Firebase (Analytics, Remote Config) | App interactions (for example which screens are opened and which ads are seen), device and app information, identifiers, approximate location | Understanding how the app is used, fixing problems, and adjusting app settings remotely |
| Google Play Billing | Purchase information for the optional one-time "Remove ads" purchase | Processing and restoring the purchase. Payment details are handled by Google Play; the app never sees them. |
| Google Sign-In and Google Drive (optional backup) | Your Google account email address, and the vault files you back up | Only if you turn on Cloud backup: your files are uploaded to your own Google Drive (in a folder the app creates; the app can only see files it created). Backups are not encrypted by the app and are visible in your Google Drive. We never receive them. |
Privacy policies: Google · AppLovin · Meta · Pangle · InMobi · Liftoff
All information sent by the app and these services is encrypted in transit (HTTPS). We do not sell your personal information.
4. Your choices
- Ad consent: change your choice any time in the app: Settings → Privacy options (shown where required).
- Personalised ads: reset or delete your Advertising ID in your phone's settings (Settings → Google → Ads, or Privacy → Ads).
- Remove ads: a one-time purchase in Settings turns off all ads.
- Backup: Cloud backup is off until you turn it on; sign out any time in the app. Delete backups from your Google Drive.
- Optional features (App Lock, Lock WhatsApp chats, Hide notifications, intruder selfie, contacts) only work after you turn them on and grant the permission; you can revoke permissions in Android settings.
5. Data retention and deletion
Data on your device is kept until you delete it or uninstall the app. Backups in your Google Drive are kept until you delete them there. Analytics data is kept by Google Firebase for a limited period under its retention settings. To ask us to delete analytics data linked to your device, email saffronapplications@gmail.com with the subject "Delete my data"; we will respond within 30 days. You can also reset your Advertising ID at any time.
6. Children
The app is not directed at children and is intended for users 18 and over. We do not knowingly collect information from children. If you believe a child has provided information, contact us and we will help remove it.
7. Security
Your PIN is stored hashed and vault screens block screenshots by default. No method of storage or transmission is completely secure, so keep your PIN private and keep a backup of important files.
8. Changes to this policy
We may update this policy. The new version will be posted on this page with a new effective date.
9. Contact
Saffron Applications · saffronapplications@gmail.com