The best replacement for iphone maps is google maps.

The best alternatives to iphone maps are rated as following:
★★★★★  google maps
★  vz navigator

Your alternative for iphone maps is not listed? Suggest!
Speaking about iphone maps, one probably shouldn't forget about voice.

Other search terms related to iphone maps and their ratings are:
★★★★★ voice
★★★ street view
You have in mind a companion for iphone maps and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of iphone maps in all years. Click on graph for more.
iphone maps
google maps
vz navigator