Screen Recorder Internal Audio is a free, stable, and high-quality screen recorder for Android. With this app, you can record your Android screen in various resolutions (QHD, FHD, HD, etc.) with system audio and your microphone.

One of the best features of this app is the overlay button on the screen that quickly starts recording. You can record both internal audio and mic audio, and the app supports 2K/QHD resolution and 60fps recording. The app also has a facecam feature that allows you to record your face while you are recording your screen. This feature is particularly useful if you want to create a livestream game.

Screen Recorder Internal Audio also has a built-in video editor that allows you to trim, cut, crop, rotate, and add effects, stickers, and music to your recorded video. The app is lightweight and fast, and you don't need root access to use it. Plus, there's no watermark on your recordings, so you can use them however you like.

It's worth noting that internal sound recording is only available for Android 10 and up.

Overall, Screen Recorder Internal Audio is an excellent screen recording app for Android that offers a range of features and editing tools, all for free.