photoo

Photoo makes cleaning up your photo library like a card game. You sort through 16 shots at a time (you can change it to 10–30 in settings); swipe left to delete, right to save to favorites, and up to keep and move on. Each card shows details like time and location, plus a tag that tells you what's in the picture. Besides swiping, it creates a "photography portrait" from your library, automatically flags duplicate and bad photos (blurry, dark, overexposed), and shrinks photos or videos to about half their size without much visible loss. Deletions aren't permanent until you confirm, and you can undo any mistakes. Privacy is key: Photoo doesn't ask for any network permissions and runs all face-detection and classification on your phone, so your gallery never leaves it. The downside is that while the source code is public for security checks, the developer has said no to forks, redistribution, and commercial use, so "open source" here means you can only look at it.