A free program for Android, by Roman Sisik.

If you want to make a panorama but don’t want to manually do it, then this is for you. It is a handy app that can be used to stitch multiple overlapping photos together. The output can then be cropped to your desired size. It also allows you to rotate and flip the final image. It also has a function that allows you to use it in scan mode, which is more suitable for stitching scanned documents.

How to use it?

When you open the app, you will be given an option to choose from the multiple images that you want to combine.