Well my former bomb proof mill spec cell phone got to point where it was functionally obsolete. It was not a big screen (about the size of an old Garmin). The new phone is one of the Samsung Galaxy series not marketed by the big cell carriers, but is mil spec, waterproof and a replaceable battery since I tend to keep the phones a long time. Therefore a GPS ap is worthy ad, although I plan to stick to my "stoneage" navigational methods of map and compass. I usually stick to the Northeast. I did stick an additional memory chip in it
Gaia seems be popular, be it free or paid. So any other aps I should check out?.