Best easy to easy iso app to find photoshopped pictures an revert easy to oringal

Not sure what you're asking there. Care to explain more?

At a guess: If an image has been modified with Photoshop then the only thing that can revert it to its original condition is the actual instance of photoshop that did the modifications and so can undo the history.

Assuming it is a PSD. I doubt that would work on a jpeg.

That too. good point.