In March 2012 i bought Garmin USA app for iphone.
then i realized that the map is very updated, missing several main streets in my area.

What pisses me off even more is that i have a Garmin map for Mapsource downloaded in late 2011 that's up-to-date!

I've already used the iphone app with custom maps for other countries.

-Will there be a conflict if i use the US Mapsource map in the iphone?
-is there a way to know if and when the Garmin app will be available with a more recent map?