How much data is used by iMaps? For a trip of 30 miles it shows data usage of 5 MB. Is this common? (I used Apple maps one way and Google while coming back and didn't use data for anything other than navigation). How does Apple and Google maps compare in terms of data usage? I had cached local neighborhood data on Google maps, not sure whether it was used or Google maps downloaded again. Any suggestions on reducing the data usage? I am on At&t with 300 MB plan.