If you are in Calgary and if you want to know when the next bus is coming to your bus stop, Calgary BUS 66 is the right tool for you. This app is using SMS/TXT services provided by the transportation company – you do not need to have a data plan to use it. How to use it? It is simple. Tap ‘+’ to add a new query, specify station number and bus number, tap the ‘txt’ button at the bottom of the screen and that is all.