Looking for a Camera App ...

[Jimskalajim]

I've been looking for a app to do this and cant find it. Basically the situation is this, I'm a painter (interior) and like to post before and after pics. The thing is that it it impossible to get the angle right to do it close enough to exact same location. I'm thinking it wouldn't be difficult to somehow use that panoramic effect the camera already has to overlap the before and after images. If anyone has seen anything like this please let me know! Thanks