Here's one more detail about Reuk that I really like. When you tap and hold on the values you can lock them so that you don't accidentally swipe and change them, to show that a certain value a little lock icon appears next to it. But I wanted to make it a little nicer than just fading it in, so I fade it in, and then you can see it lock. When you unlock the value by tapping and holding again, the opposite happens, it will unlock and then fade out.
You can check out a video of the animation in action here.
You should also go get Reuk on the App Store if you haven't already, I think you'll enjoy it!
