This iOS-only quick-collage app doesn’t offer a huge number of layouts or options. The one thing it does better than any other mobile app– it can handle any number of images and make a square collage out of them, quickly and automatically. (And I mean ANY number– one of my tests used over 400 images!)

Unfortunately, the free version only exports low resolution images- you can pay for higher definition output.

It may be a one trick pony compared to the other collage apps, but it’s the only app I’ve found that will work with more than 20 images in a collage, so if you need that trick, this is the pony for you.