Hello Friends. I am a newbie to riding and this forum. I just purchased a TreK FX 7.4 Hybrid and I have the riding bug. I have seen all of the phone apps and GPS systems for riding. I did read that the phones loose their battery quickly during a ride if using one of the apps......Strava or Map My Ride. I suppose I'm trying to figure out from those of you with experience, why buy a GPS when I can just use a phone app? Thank you!!