A free app for Android, by Tweaking Technologies.

If you have lots of duplicate or similar-looking photos on your Android device, Duplicate Photos Remover – Recover Storage Space will help you get rid of them. It scans all your internal and external storage (SD card, if available) and categorizes them by photo group so you can easily delete the ones you don’t need. It’s a complete automated process so you don’t have to manually sift through all the photos.

How does it work?

After installing the app, launch it and set the scan mode. Then, choose one of the two options for the SD card or internal storage: Remove All or Only Duplicate.