This app isnt good at predicting accurate times

While in theory this app is a great idea, this app is not helpful at predicting accurate times of buses, many times it is off by 20-30 mins or will say no predictions are available at this time! There is another app out there, its not much better but its alright Bos next bus. And its free. It really shouldnt be this hard to give accurate bus times especially with buses that have a tracking system!

desypo about Where's my MBTA Bus?