Logitech Arx Control app works in conjunction with Logitech Gaming Software to give a look inside your PC and Mac.

Linking to your computer over a shared network, the app displays your system performance. Live monitoring shows a ton of stats, including the current GPU usage, fan speed, and even internal temperature - perfect for deciding your next upgrade.

Other functions include a game list, and remote control of media functions (including volume).

It's a bit of fun, but only really for tech heads.