This is a piece I made with a 3D app from Pixite Apps. The specific app is called Matter App.
It has several 3D shapes. You can let the shapes reflect from your surface or you can put an image or a color inside the 3D shape.
I used SuperimposeX to layer gradients and textures under the initial piece.
Pixite has several great apps for iPhone and iPad. I highly recommend the price of a few dollars that these apps cost.