No Use for Me

I downloaded this app because Im visiting from out of town, and the bus route Im using does not have a published schedule on the web. Apparently this app gets its info from that same place, because the info was also unavailable on the app. The 504 bus is likely not a frequently used route, and apparently MBTA sees no need to publish its Sunday schedule - if in fact it runs on Sunday at all - I still cant find any information on it.

Aida435 about Where's my MBTA Bus?