Not being a photographer does not mean one can not have beautiful pictures. It is fine if you don't know the techniques of using light or deciding the angle. There are these apps to do those things for you. These apps will help you make your photographs better, the way you want to. If not up to a professional photographer's level, at least fit to please you and other viewers.
We have always been saying that there is an app for everything, then why not for editing photographs. Scroll down to know the options.
Photo Editor
It is a simple and easy application for photo manipulation with many other options like adjust color, add effects, rotate, crop, re size, frame, clone, and draw on your photos.
PicsArt Photo Studio 
Become an artist! It is one of the most popular free mobile photo editors and claims to be a combination of drawing tool, art network, photo grid, collage maker and more.
Photo Editor for Android
It is a simple and free image editor. With this application, users can turn their mobile device into a small studio for editing photos.
Photo Editor by BeFunky
Well... this is something with which you can make unlimited edits to your photographs. When we unlimited, we mean unlimited!
Photo Editor by Aviary
Praised by a lot. You can actually correct the problems in your picture like red eye, blemish, whitening etc. Enhance your pictures with the perfect tools provided.
Photo Effects Pro 
It is really a fun app. You can not only make your photographs more beautiful but also add some fun elements like memes, strickers and text to them. Make you profile pictures more interesting.
PicSay - Photo Editor
As the name suggests, you can say something through your photographs, in word bubbles. Stuffed with other exciting tools and options to edit your pictures.
So which one are you going to try? Are you already using one? How is it? Share your thoughts with us in the comments section below.Join us on Facebook to get all the exciting updates.
I use the free one offered by Aviary and love it!