PicEm Photo Collage for Instagram, Facebook, Tumblr and Twitter + editor free for iOS

PicEm Photo Collage contains many collage layouts, photo editing tools, effects, and frames, so you can make great collages from your photos. Choose from tons of different layouts and boarders, select the photos you want, and edit them individually to create the right effect. Then share your creations with your friends and family straight from the app.

As soon as you install PicEm, you can get right to work making great collages. The interface is intuitive and attractive, with a tutorial that pops up the first time you open the app to help you get started. If you need help later, the tutorial is available from the Help menu at any time. To begin a collage, select your layout from the available options. There are layouts to accommodate between one and six photos in many different arrangements, and you can select a boarder now, although you can do that later on, as well. From the layout screen, just double tap a cell to select a photo to put in it, adjust your photo using the various tools provided in the editing screen, and then move on to the next cell. You can adjust brightness, contrast, and saturation of all of your images individually, as well as add filters and other cool effects. And when you have everything where you want it, just hit "Share" to send your collage to Facebook, Instagram, Twitter, or to save it to your camera roll.

Another fun option is to turn your collage into a physical postcard that can be sent anywhere in the world with your own personal message printed on it, although you have to create an account on Sincerely to do that. This app is free, it works well, and it has lots of handy features. And if you want even more options and no ads, you can upgrade to the pro version for $1.99.