Simple App Locker is a lightweight and secure app lock solution designed to protect your private apps using a 4-digit PIN or fingerprint lock. If you’re looking for an easy-to-use app locker without unnecessary features, this app is built exactly for that purpose. It focuses on speed, simplicity, and reliability, making it ideal for users who just want to lock apps without dealing with complex settings or cluttered interfaces.

Unlike many app locker apps on the Play Store that overload users with extra tools, Simple App Locker keeps things minimal. It includes only the essential features needed to secure your apps, such as enabling app locks individually and choosing between fingerprint or PIN protection. The clean and intuitive UI allows you to configure everything quickly, making it a perfect choice for users who value simplicity and performance.

To work properly, the app runs a background service to detect which app is currently opened. On some devices (like Xiaomi, Redmi, Huawei, OnePlus, and Meizu), Android may stop this service due to battery optimization. To avoid this, users should add Simple App Locker to the battery optimization whitelist. The app only requires Usage Access permission, which is necessary to monitor active apps. Your feedback is always welcome—please try the app, share your suggestions, and leave a review on the Play Store if you find it useful.