On the iPhone I would give it 4.5 stars, with an undo feature I would give it 5 stars. On the iPad however it crashes so often its virtually unusable. I reported this and the exact steps to make it crash weeks ago with no response or fix from the makers. BTW the steps to make it crash are using it for more than one picture, a lot of the time it will not even do one. Always crashes on step 3, saving after the work is done.
AimlessDemon about Watermark Photos & Copyright, v1.2