Polaris File Manager is a free Android app developed by michaelwang. It is a phone cleaning app that helps users to clean junk files, audios, videos, and manage apps.

The app’s Junk File Cleaner feature scans and deletes all unnecessary files, freeing up storage space. The Audio Cleaner feature helps to find and delete audio files that are no longer needed. The Video Cleaner feature does the same for video files. The App Manager feature allows users to uninstall apps, move them to the SD card, and backup or share them with others.

Overall, Polaris File Manager is a useful app that helps to keep your phone clean and organized. However, it is worth noting that the app contains ads, which can be a bit annoying at times. If you are looking for a free phone cleaning app with basic features, Polaris File Manager is worth considering.