For other locations in MN, Eastside Pinball at Sun Ray Lanes and D&G Amusement at Mortimers have PayRange. It is nice. That said, the PayRange app works MUCH better on Apple phones than Android ones. I have an Android phone and I still use it all the time though. Now I have lots of quarters filling up my change jar at home that I used to always grab to go play games.
The technology is bluetooth. I want to say it was about $50 per game to implement.