I've covered various apps which let you add text to pictures, like Over, but another one has popped up which is now becoming pretty popular.
PicLab is a new photo editing app which has a beautiful and simple user interface that I find a lot friendlier then Over's. It's made purely just to add text and some simple masks to add a unique look to your photos.
The app features some brilliant and popular fonts which are held high by the design community, such as Gotham, Proxima Nova and Museo Sans.
It's also free unlike many other apps so it's definitely worth trying out at least. There is an in-app purchase to unlock even more content to edit your pics.