I've been using Rover on iPhone for a few months and it's great. Prior to Rover the best option was using both Google Maps (great routing, but no real-time schedules for SF transit) and Routesy/Nextmuni (real-time schedules, but no routing)-- two apps for every bus trip. Muni buses are more often late than not, so Rover is solving a real problem with just the walking+transit piece.

It also has InstantCab/Uber/Sidecar integration now so you can compare $ and time across options.

Combine that with driving+parking, bicycling, and personal calendar data, and it'd be the killer one-click transit app I've always wanted. Can't wait to see you all build this out!