My ForeFlight wanted to do a software upgrade (software, not charts) last week. Today I was taxing for takeoff cleared to cross runway 21 on the way to 26R, the active runway. As I approach runway 21 I heard a voice; "Approaching Runway 21/03". It took me a minute to realize the voice came from my ipad. Pretty soon I heard "Entering Runway 21/03". The ipad also has a visual warning on it. I wasn't on a taxi chart, just the sectional.
After my run-up I approached the hold short bars of 26R and it did it again.
Cool new feature!