As a native here, i will recommend searching the address you need to go on Google Maps first, then click Directions and Bus. This is a better solution than the septa app. Google Maps will actually show you every stop the bus will make to keep you feom getting lost. Also, shows you the time difference between your arrival from one bus and the departure of another.

Septa app is only good for looking at advisory messages, road closes, and etc.

Hope this helps.