App Lock - Fingerprint Lock by 360 Tool positions itself as a comprehensive security solution for Android users seeking enhanced privacy controls beyond standard device security. The application addresses growing concerns about digital privacy by offering granular control over app access, media visibility, and device sharing scenarios. The core functionality centers on three primary security layers: application locking with PIN, pattern, or fingerprint authentication; media vault capabilities for photos and videos; and usage restriction features for child safety. The app employs system-level integration to prevent bypass methods, though its effectiveness varies across Android versions and device manufacturers. Notably, the fingerprint authentication leverages Android's native biometric API rather than implementing custom solutions, providing more reliable security integration. User experience demonstrates a straightforward interface with categorized security options and quick-toggle functionality. The app maintains background operation with minimal battery impact, though some users report occasional reload prompts when switching between applications. Real-world testing shows effective prevention of accidental access during device sharing scenarios, though determined technical users might identify workarounds on rooted devices. User feedback trends indicate generally positive reception, with multiple five-star ratings reflecting satisfaction with core functionality. One user, Gabriel Argintar, repeatedly emphasized on September 12, 2025 that the application 'helped me for a lot of things including me not getting hacked' though the reviews lack specific technical details about implementation or encountered threats. The application demonstrates strongest performance in casual security scenarios rather than enterprise-grade protection. Limitations include occasional compatibility issues with certain Android skins and the inherent security constraints of software-based solutions on non-rooted devices. Ideal use cases involve personal device sharing situations, parental controls, and basic privacy maintenance rather than protection against sophisticated threats.