The Navionics mobile app information, though containing the same chart data, can not be installed, displayed, or saved onto a media (memory) card to be used in a chart plotter/GPS/fish finder unit. We do offer our own plotter charts for purchase through our website or through any of our numerous dealers. A GPS plotter card would require an additional purchase. To determine which GPS plotters are compatible with Navionics charts you can consult our Compatibility Guide at http://www.navionics.com/compatibility.
The Compatibility Guide indicates which plotters are supported by Navionics, as well as which format they use, which specific charts the plotters are compatible with, and the features that the plotters can utilize.