When comparing Copilot GPS vs Avenza Maps, the Slant community recommends Copilot GPS for most people. In the question“What are the best offline GPS navigation apps for Android?” Copilot GPS is ranked 14th while Avenza Maps is ranked 19th. The most important reason people chose Copilot GPS is:
Includes free trial for ActiveTraffic data, giving you fastest routes taking into account traffic data which can help save time when driving at high traffic times.
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Pros

Pro Saves time by adjusting routes on the fly depending on traffic
Includes free trial for ActiveTraffic data, giving you fastest routes taking into account traffic data which can help save time when driving at high traffic times.
Pro Has navigation profiles
Remembers routes/places traveled to.
Pro Works really well in metro areas

Pro Free offline mapping for convenient use when away from data
Users can download map packs for different regions along with points of interest to allow for easy navigation when in an area without data or using a device that does not have a cellular data connection such as a tablet.
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
Cons
Con POI search somewhat lacking
Hard to find some places that are present on different maps.

Con Premium can be pricey
Premium features unlock unlimited voice navigation and ActiveTraffic can cost quite a lot at $29.99 when compared to other premium map/navigation apps.
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.
