When comparing Karta GPS vs Magic Earth, the Slant community recommends Magic Earth for most people. In the question“What are the best offline GPS navigation apps for Android?” Magic Earth is ranked 3rd while Karta GPS is ranked 15th.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Wrong-way driver warning
This was not heavily promoted by them, but it just shows the level of awareness these guys have. It's a small feature, developed in partnership with Bosch, that will warn you if a driver is coming your way on the wrong side of the road.
Pro Uses OpenStreetMap data
Hence it continually improves, is easy for you to add missing information or fix inaccuracies.
Pro No tracker
Pro Offline mode
Possibility to download maps for offline access.
Pro Speed limitation
Speed limit display with the possibility of signalling an excess of speed.
Pro Open Street Maps
Uses open street maps and there are no ads.
Pro Traffic
Handling of traffic.
Cons
Con Excessive amount of ads
Con Top part of the screen wasted next turn information
Con Proprietary software
The source code is not available.