Antikythera Mechanism

A little bit of historical background information would be nice as well as description of the functionality and just how advanced this device was. Nicely executed.

This thing is really cool to look at, but there's a problem. You see it works on my iPhone SE just fine, but for some reason, it doesn't work at all on my iPad mini 2 running iOS 9.3.5. It just crashes upon opening! I know it's an old OS on old hardware, but this is not an app that needs a whole lot of power. I mean, you can't run the first computer on an iPad that's only a few years old? Come on! I can't even see what it says on iOS! So please fix this, and I'll give full stars, otherwise 2.

The programming is absolutely wonderful and I think the concept is perfect. However, I find the rendering makes reading the dials on both sides very difficult to read. Also, the controls seem a wee bit, make that, pretty sluggish. How about a higher contrast view and a lock on the side of the mechanism that is to be read.