MARU KAKU -まるかく/丸型＆正方形アイコンメーカー
This App provide you with circle and square icon.
All you have got to do is select shape and crop image.
【Features】
■Extremely simple
■Intuitive operation
■Circle shape doesnt have background, so you can superimpose the photo generated on other photo.
Try it for Twitter,Instagram,Facebook,etc.