[msla]

In Missoula, Montana, where I live, the Mountain Line app shows you where every individual bus on a given route is, and computes ETA to a selected bus stop.

I'm pretty sure that's common functionality.

(To be honest, the Mountain Line is very punctual, so I could likely do just fine with just a printed schedule.)

[e12e]

Where I currently live, the bus app does the same, but the difference between scheduled time at each individual stop is typically 1-3 minutes. So it's not like off-line functionality would be useless, even if on-line can add value. But it obviously only adds value when you're on-line - and if off-line the app doesn't work at all...

[peatmoss]

Displaying the live AVL data for all Missoula busses is not too bad. In Seattle where I currently live, not so much. Thus, most of our apps here tend to give arrival times of busses with nearby stops.

Fun aside: my dad drove for the Mountain Line many years ago. I rescued one of his 1970s yellow shirts with the embroidered logo patch a while back.