When comparing Avenza Maps vs TomTom GO, the Slant community recommends TomTom GO for most people. In the question“What are the best offline GPS navigation apps for Android?” TomTom GO is ranked 7th while Avenza Maps is ranked 19th. The most important reason people chose TomTom GO is:
Detailed lane guidance system helps drivers make the right exits.
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Pros
Pro Very detailed official local maps
Supports official maps published by park services, etc, which often have more details than any other map available.
Pro Save placemarks
Pro Records GPS tracks
Pro Lane assist
Detailed lane guidance system helps drivers make the right exits.
Pro Traffic alerts
Up to the minute updates of traffic alerts based on floating car data.
Pro Color themes
There is a good selection of color themes to pick from which are reflected across the interface.
Pro Offline
Doesn't require an active internet connection.
Cons
Con Cannot use SD card
Even though the maps are free of charge and some of them are official park maps without copyright issues, the app still refuses to store them on the SD card, so the map storage tends to take up far more internal flash memory than any other app.
Con Map search is awful
Searching for map files is very frustrating as the map search only shows the center point of each map as a pin, so you can't see whether the map includes a point you're interested in, and since there are usually many historical maps of the same location, they produce many pins appearing on top of each other. You have to download each one and open it in order to see what it will look like, rather than previewing them in the live display. Good overview maps will appear as pins in random locations, while there will be tons of topo map tiles everywhere else
Con Only shows one map at a time
It supports USGS topo maps, for instance, but if you walk off the edge of one, you have to manually load the adjacent map, which is a hassle. It would be nice if, like other apps, you could select "USGS topo" as the map source, and it would automatically show whichever specific map your location is currently near the middle of (since the USGS maps have margins and legends, etc.)
Con Only supports local maps
You need to plan ahead and download a map for each park or region you're going to visit before you go offline.
Con Slow development
TomTom are nortoriously slow on the development of the app, seemingly not interested in staying ahead of it's competition. As a result, there has been very little in the way of improvements with the exception of map updates.