With open source systems like this, Navmii will ask you to always update the details of which are always given relating to the areas that continue to evolve. Nearly 20 thousand corrections have been made by Navmii and perhaps for the premium versions, updates like this will be more and more.
This application will store the details in memory, so you do not need to always use a 3G connection all the time. This application can be downloaded for free for the region Europe, North America, Australia, New Zealand, India, South Africa, and Latin America.
If interested, you can download this application through the Android Market link.