It works!

Bypasses waiting on the phone big time - used it on 4 occasions the cab showed up each single time and I didnt have to wait on the phone line during peak times - every Calgarian knows that pain. The gps system shows you where the cab is relative your location and it gives you your cabbies Id. Tweak the interface a bit and It will be an awesome app.

Banjo102 about Checker Cabs Calgary, v3.1.4