Have you heard of KIS? Keep It Simple, that's the idea behind the BART Map application.

Features:
* Full size map of the San Francisco BART system
* Pinch zoom, scroll left and right on the map
* Trip planner
* Live train positions on map. Tap a train and get it's destination

No internet required for map.
Internet required for live train positions and trip planner.

Displays live train positions on map.
Trip planner
iPhone 6 and 6 Plus optimized