Ultra Lock - App Lock & Vault for Android

Quick summary of the app

Ultra Lock — App Lock & Vault is a free privacy app from Mirage Stacks designed to protect private files and block unwanted access to apps. It supports traditional PINs and custom pattern locks, and includes several inventive locking options intended to make guessing codes more difficult.

Distinctive changing-PIN options

Rather than relying solely on a single static code, the app offers a few dynamic PIN schemes that update automatically:

• Battery-level PIN: Uses your device’s current battery percentage as the unlock code, creating an unpredictable, frequently changing key.
• Date-based PIN: Sets the PIN to the current day and month, so the code rotates every 24 hours.
• Time-based PIN: Derives the PIN from the present hour and minute, producing a code that changes every minute.

These modes eliminate the need to remember a fixed number and can frustrate casual attempts to guess the lock.

Extra security features

Ultra Lock also includes an intruder-capture tool that snaps a photo with the front camera when someone enters an incorrect password multiple times. This helps identify unauthorized access attempts and provides evidence of tampering.

Known limitations

Despite its creative PIN options and intruder snapshot feature, the app has a few drawbacks worth noting. Several users report intermittent technical issues that can affect reliability. Most importantly, Ultra Lock does not include biometric unlocking (fingerprint or face recognition), which many competing app-lock tools now offer for seamless, automatic access control.

Alternatives and recommendation

If you require biometric authentication or a more polished, dependable experience, consider alternatives such as SafeInCloud Free or apps that advertise fingerprint and face-unlock support. Ultra Lock is a solid choice for people who prefer rotating PINs and want extra deterrents like intruder photos, but it’s less suitable for users who expect fingerprint/face-based convenience.