Iphone photograph capture

I wanted to snap a picture, potrait, scene, etc. in a selected fixed shape. For example, before snapping the picture, there are different fixed shapes to choose for taking the picture such as a hexagon shape, a bag shape. Once the picture is taken, it will be in the fixed shape. Anything out of the boundary will be transparent, automatically removing the background. Please bid only if you are keen on this project and I would preferably want to see some of your past working examples. Thank you.