AppLock by Lite Tools Studio is a free security app that provides 360° protection to your smartphone. It is an excellent anti-intrusion tool that allows you to lock apps such as Facebook, WhatsApp, Snapchat, and Messenger, along with phone settings and app markets. The app also features a privacy note that provides a safe and simple editing experience for your notes, messages, and emails.

With AppLock, you can hide your personal pictures and videos by locking gallery and photo apps. The app also offers a feature to catch intruders in real-time by taking a photo of anyone who tries to unlock your apps. With over 100 million downloads worldwide, AppLock is a reliable app that ensures your privacy is always protected.

The app is lightweight and powerful, using less than 2MB of space on your device. It offers various unlock modes, including pattern lock, password lock, and fingerprint lock, which can be switched at any time. Additionally, the app is easy to use, with just one click to set locked and unlocked apps.

Overall, AppLock is an excellent privacy guard that secures your smartphone from unauthorized access and ensures that your personal information remains safe.