In the past I have used Garmin 550 and Nav V, none of which are without problems. I have a iPhone 7 but the screen is too small for me while driving no matter what app I use. strongly considering a Samsung galaxy tab 4 exclusively for navigation purposes and mounted on the dash. the question is, which map app? I have been told to try google maps but thought posting here would be invaluable considering I went tp do boon docking 90-95% of the time. any help and direction would be most appreciated.