Private Lock: Privacy Policy

Effective: 7 November 2026. App: Private Lock (Android package app.privatelock.applock). Published by Atlas Digital Studio Pro ("we"). Contact: hello@privatelock.app.

The short version

Private Lock has no accounts and no servers of ours. Your PIN, settings, activity log, hidden files and intruder photos stay on your phone. We do not collect, receive or sell your personal data. The only data that leaves your phone is what the Google ad software collects to show ads (described below). If you buy "Remove ads", the app stops requesting and showing ads, and the ad software is no longer started when you open it.

What stays on your phone

• PIN and duress PIN: stored only as a scrambled value (HMAC-SHA256 with a key held in the Android Keystore that cannot leave the device). We cannot read or recover them.
• Settings, protected-app list, schedules and activity log (unlocks, failed attempts and mode events).
• Vault files: photos, videos and files you hide are encrypted (AES-256-GCM) with a Keystore key. Optional backup files are sealed with a passphrase you choose; we cannot recover the passphrase.
• Intruder photos: if you turn the feature on, the front camera takes a photo after wrong PIN tries. It is stored encrypted on your phone and shown only in the app. It is never uploaded.
• Which app is in front: the Accessibility service sees the name of the app that opens so it can show your lock screen. It does not read screen content, text, passwords or messages, and it does not store a history of apps beyond your own activity log on the phone.

Uninstalling Private Lock or clearing its data deletes all of this permanently. Keep a vault backup if you want a copy.

Permissions and what they are for

• Accessibility service: to detect which app opens so the lock screen can appear. Not used to read content or act on your behalf.
• Camera (optional): intruder selfie.
• Notification access (optional): to replace a locked app's notification content with "Content hidden".
• Device administrator (optional): only to stop Private Lock being uninstalled without your PIN. No other device policies are requested.
• Notifications: to warn you if protection stops.
• Biometrics: to use your fingerprint or face unlock where you choose it. Android handles the biometric check; the app never receives your fingerprint.
• Internet and network state: only for ads and for checking your purchase.

Ads and purchases (data that leaves your phone)

The free version shows ads using Google AdMob. The Google Mobile Ads SDK automatically collects and shares with Google, for advertising, analytics and fraud prevention: IP address (which can indicate approximate location), user interactions with ads (such as taps and video views), diagnostic information, and device and account identifiers such as the Android advertising ID and app set ID. All of it is encrypted in transit. In the UK, EEA and other regions that require it, you are asked for consent before ads are requested. You can reset or delete your advertising ID, or opt out of ad personalisation, in Android Settings → Google → Ads. See Google's policy at policies.google.com/privacy.

The one-time "Remove ads" purchase is processed by Google Play. We receive only confirmation that the purchase exists; we never see your payment details.

What we do not do

• No accounts, no analytics of our own, no crash reporting of our own, no tracking across apps.
• We do not sell personal data or share it with anyone except as described for ads above.

Children

Private Lock is not directed to children under 13 (or the minimum age in your country) and is intended for users 18 and over.

Your choices and deletion

We hold no personal data about you on any server, so there is nothing for us to delete. To remove everything stored by the app, uninstall it or clear its storage in Android Settings. To limit ad data, use the Android advertising controls above, or buy "Remove ads".

Changes

If we change this policy we will update the date above and the in-app "What we can see" screen.

Contact

Atlas Digital Studio Pro, hello@privatelock.app