ParkPlus released their app a couple of days ago. I'm not overly confident in it working, but I'll do anything to not use those damn machines on the street. I've never successfully had one read my card the first time (which means I enter in info twice).
https://itunes.apple.com/ca/app/mypa...586362269?mt=8
You have to create an account and load it with money, so it's a little bit like having a Starbucks or Tim Hortons card, but for parking.