All available on iPhone and most should be available on other phones as well.
Here are my favorite apps and what you can use them for!
1). Camera+ : Edit photos! Cool filters and easy adjust settings for contrast, light, etc. cropping and edit photos is really easy with this app.
2). Boomerang: Make super fun gifs of yourself! These short looped videos are great additions to any album and way cuter than a standard length video sometimes.
3). Collage and Pic Collage: Both allows you to put pics into frames (like below). Pic Collage has a better freestyle option and Collage has a wider array of cute backgrounds.
4). Meitu: bomb photo editing app, after all it hails from China where doll-like appearances are the norm in the retouching world. You can do everything from slim, smooth and lighten skin to add makeup! Check out my before and after for example.
5). Lightroom: this is the best editor on the market and now it is in app form! Easily adjust lots of settings for photos to make them way better looking, like how I did with the light, clarity and tone of my skin below.
Hope you
Enjoyed!