Ranked in these QuestionsQuestion Ranking
Pro Good address data
This app can locate address without external data.
Pro Detailed and up to date commercial map data
Utilizes commercial data for its maps. While not strictly better it can have more up-to-date map data than OSM with better coverage. This is also the reason for the the good address data.
Pro Lane guidance
Pro Offline navigation
Internet connection is not required.
Pro Heads up display
Con Poor map viewing
Sygic's interface is tailored to navigation. While viewing maps in 2D is possible, it populates the map with a bunch of POI icons which detract from street names. The biggest issue is how easy it is to select something or start navigation when zooming in/out.
Con Updates require running the app
After a Play Store update it is important to run the app once to download all the offline data again, otherwise it will not be usable when no external data is available.