Gold Award-winning auto-runner Boson X is free on the App Store right now. It's probably the best auto-runner than money can buy. And right now it's definitely the best auto-runner you can download for nothing.
The game sees you sprinting through a shifting tube of platforms, attempting to charge your energy meter up by running on glowing panels.
At review we called it “a spectacular kick in the teeth of the endless-runner genre,” adding that “Boson X is a brilliant, twitching wonder.”
And you can grab all of that right now for nothing at all. If you've yet to experience the sharp-edged sprinting lunacy of Boson X, you should definitely head to the App Store and get it right this second.