What's the best Android app for locking apps with fingerprint security?

App Lock is a well-regarded Android application designed to enhance device privacy by allowing users to lock specific apps with fingerprint authentication. This feature is particularly useful for scenarios like preventing friends or family from accidentally accessing sensitive applications, such as banking or messaging apps, during shared device usage. The app supports customizable settings, including the ability to set up backup PINs or patterns, and it can lock multiple apps simultaneously. Users report that the fingerprint recognition is responsive and reliable, making it a practical choice for quick, secure access. However, some reviews indicate occasional ads in the free version, which might be a minor distraction. Overall, App Lock balances ease of use with effective security, though it's advisable to test compatibility with specific device models for optimal performance.