Applock Cool is a popular app locker that offers robust security features to protect your privacy. With AppLock, you can easily lock your apps or photos using a password, fingerprint (if supported), pattern lock, or knock code. Prevent unauthorized access to your private apps like WhatsApp, Instagram, Messages, and more. Features include spy camera, fake error message, hide notifications, lock timer, re-lock time, spy alarm, and customization options. Choose from fingerprint lock, knock code lock, pattern lock, or pin lock for enhanced security. FAQ section addresses common questions about preventing uninstallation, permissions, password recovery, hiding pictures and videos, and how the spy camera feature works.