This is a handy app that lets you see the progression of your weight loss in a gallery form. Take as many photos and videos as you want and the they will be separated in week blocks.
This in not a side by side weight loss picture app. There are plenty of photo collage apps out there to do that.
I don't know about you, but it can be pretty annoying to go back and find those original weight photos with a crowded galley. Sure you could create albums, but when you forget to add a few weeks then it can be frustrating. Instead, just open up *Weight Loss Photos and keep all these photos in one place.