Great idea, difficult to use – The Fake Coin for iPhone Review

This is a classic very hard math problem and a good idea for an app. The UI it's very difficult however. I couldn't remember which color was lighter or heavier or how many taps for each. I also think the instructions are wrong on which direction the arrow points. Since the developer only has one app I'm guessing this is a first effort and for that it seems fine. But it would need to be easier to use to give to someone new to the problem.
Review by Blueglass282828 on The Fake Coin for iPhone.