S9 Navigation bar (No Root) is an Android application designed by MegaVietbm. It falls under the category of Utilities & Tools and is a free-to-use app. The latest version of the app is an improvement over the previous one with a more lightweight design, smoother transitions, and improved performance. The app is compatible with Android 4.1+ (Jelly Bean and up), making it accessible to a wider range of users.

The S9 Navigation bar (No Root) app offers more gestures with each button and additional features with each gesture. The app also includes two bonus buttons on the left and right side of the navigation bar. The gestures include click, press and hold (long press), swipe up, swipe down, swipe left, and swipe right. In addition, the app uses Device Administrator permission for locking the device when using the feature turn off the screen. It also uses Accessibility services to receive notifications when interacting with an app to make color auto change and enable some features like back, recent press, etc.

Overall, S9 Navigation bar (No Root) is a useful app for Android users who want to customize the navigation bar with additional features and gestures. It is easy to use and does not contain any ads. The app is a great improvement over the previous version and is worth using.