A free program for Android, by Factools.

Auto Background Eraser: A Step in the Future is a powerful tool for removing unwanted backgrounds from photos. This app is easy to use and efficient. Auto Background Eraser works with all the major image formats, including JPEG, PNG, and others.

The application very easy to use, and you don’t need special skills or knowledge to use it. It is equipped with practical tools you can use for major photo-editing tasks. And with a user-friendly interface, it can be used by both professionals and amateurs.

The application is free to download and compatible with Android devices.