Easter Eggs, developed by Hu Shenghao, is a free Android app that allows users to access hidden features and surprises within their device's operating system. The app provides access to the official versions of Android system built-in eggs. However, it's important to note that some of the functions are only available on newer versions of Android.

The app offers a complete code of the system egg and only focuses on part of the API compatibility. Users can find a variety of egg functions on all Android versions except for Android 11 and 7, which use new system features. If you're an Android enthusiast, Easter Eggs can provide an exciting and unique experience of exploring your device's hidden features.