This app was mentioned in 3 comments, with an average of 1.67 upvotes
Get the Minneapolis Parking App
https://itunes.apple.com/us/app/mpls-parking/id1009365391?mt=8
or
https://play.google.com/store/apps/details?id=net.sharewire.mplsparking&hl=en_US
There's also the on-street parking map and the off-street ramp map