We’ve introduced a nice universal app creating photo collages, but if you need more options, you may like to check another photography app Instapic.
Instapic developed by Hannes Remahl is also a useful photography app designed to offer you an easy way to create your own photo collages. You can easily import your photos into the universal app, and relocate them on your favorite background picked from 7 built-in backgrounds, and then save the collages to your photo library, or directly share them with your friends and families via Facebook or Email. Apart from that, Instapic also supports both landscape and portrait viewing modes.
Instapic with a size of 23 MB is compatible with iPhone, iPod touch and iPad running iOS 4.0 or later. The photography app is available for free. If you’re interested, jump to App Store for more details. Additionally, here is another option Photo Wall Pro.