When comparing Copilot GPS 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 6th while Copilot GPS is ranked 13th. 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 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 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 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 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.
