How to find iPhone photos that aren't in any album

The Photos app has no view for photos that aren't in any album. Here's how to find them and file them.

If you organise photos into albums, sooner or later you'll want to see what's left: the photos you haven't filed yet. The Photos app doesn't have a view for that.

With Photo Sensei

Tap the title at the top and choose Not in any album.
You'll see only the photos that aren't in any of your albums, with the count of how many are left.
Set a swipe direction to add photos to an album — or create a new album right from the app — and file them one swipe at a time.

On any photo, the label at the top shows which albums it's already in, so you never file the same photo twice by mistake.