TreeSize Professional is not available for Android but there are a few alternatives with similar functionality. The most popular Android alternative is 
DiskUsage, which is both free and Open Source. If that doesn't work for you, our users have ranked more than 50 alternatives to TreeSize Professional, but unfortunately only two of them are available for Android. If you can't find an alternative you can try to filter for web or SaaS options.
The powerful disk space management software If you're looking for more info about TreeSize Professional like screenshots, reviews and comments you should visit our info page about it. Below you find the best alternatives.
DiskUsage provides a way to find out which files and directories on the SD card of your Android phone are consuming the most space. It displays diagram with directories/subdirectories proportional to their size. Users are allowed to zoom in to look at specific directory content.
Grid Size file manager has all the functionality you expect from a file manager with a useful visual feature. The grid view graphically displays the contents of your storage drive proportional to the size of each folder and file. The grid view also supports image controls so that you can zoom and pan to view folders.
