The best replacement for sat nav is gps.

The best alternatives to sat nav are rated as following:
★★★★★  gps
★★★  iphone app
★★  speedometer
★★  phone
★★  tomtom
★★  speedo
★  speedo more accurate
  sat nav

Your alternative for sat nav is not listed? Suggest!
Speaking about sat nav, one probably shouldn't forget about reversing camera.

Other search terms related to sat nav and their ratings are:
★★★★★ reversing camera
You have in mind a companion for sat nav and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of sat nav in all years. Click on graph for more.
sat nav
gps
iphone app