PhotoGrid is an app that allows you to put your pictures in to photo collages, with an enormous amount of filters and special effects to your photo collage. For educational uses, the app could be used to enhance the students creative abilities in practical subjects as well as theoretical subjects. Furthermore, this app could easily be used together with the Snapseed app to further enhance your pictures The app is free to download for both Android and Apple user, and offers in-app purchases.
Snapseed
Snapseed is an editing program for photos taken by a smart phone. The app easily allows you to put on fairly advanced filters, frames and other effects to make your photos look even more impressive. For educational uses, this app could easily be used as a tool for the students to understand how a picture is composed. Furthermore, the app allows you to store your newly-edited pictures to your phone or tablet and use them in collaboration with other apps. The app is free to download for both Android and Apple users.