AppLock Pro is a popular app locker that allows users to lock their apps or photos easily. With a variety of lock models to choose from, users can select the best way to prevent intruders from opening their locked apps without permission. The app offers a range of features to keep users' privacy safe, including the ability to lock private apps with a password, fingerprint, pattern lock, or knock code.

One of the standout features of AppLock Pro is its spy camera, which takes a selfie photo from the front camera and saves it when someone tries to open a locked app. Additionally, users can set up a fake error message to further enhance security, and block notifications of locked apps. The app also offers a lock timer and re-lock time, as well as a spy alarm that rings loudly if a password is entered incorrectly five times.

AppLock Pro offers a range of lock types, including fingerprint lock (if the device supports it), knock code lock, pattern lock, and pin lock. Users can also customize the theme and background style, and choose an image from the gallery for the background. The app is optimized for battery and RAM usage, and users can use it without ads at a low price.

To prevent AppLock from being uninstalled, users should lock all critical apps and activate "Hide Icon" in the preferences tab. The app requires necessary permissions to implement advanced features, such as "Photos / Media / Files Permissions" to select a background image. If users forget their password, they can set a new one using their secret answer. Locking the Gallery app also hides pictures and videos, and the spy camera feature takes a photo from the front camera when an intruder enters the password incorrectly five times.

Overall, AppLock Pro is a comprehensive app locker that offers a range of features to keep users' privacy safe. With a variety of lock types to choose from and advanced security measures, it is a great option for anyone looking to protect their apps and photos.