Q: IOS

Yes. If desired, download the current version of it to a computer or compatible iOS device, click here, and try following the instructions.

(143053)

What model of iPod do you have exactly? You can find out in Settings->General->About->Model

You can also try to get a compatible version of the iPad is the developer has one available by first downloading the incompatible version of the App to iTunes on a computer, and then, without connecting the iPod the computer follow the steps in this support document:

Install an app on an earlier version of iOS or OS X - Apple Support

It's a fourth generation iPod touch. No other iPod model would be running iOS 6.1.6; newer ones went directly from 6.1.3 to 7.0.

(143054)

I know, I was just wanting to confirm the model and iOS version.