When comparing Copilot GPS vs ZANavi, 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 12th while ZANavi is ranked 18th. 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 Anyone can use or share the code
It's licensed under GPL which make sit ope-source, where anyone can look at or use the code which allows for an open understanding of the app.
Pro Usability focused
The core of the app is designed around ease of use which makes it an intuitive app to use.
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 Limited maps
There are many missing maps from the database making for user limitation depending on the are one lives.
