We are in process of beginning a new project that needs to render offline maps **offline maps** of certain areas. Showing pre-computed (from a web-server source) routes **routes** are needed as well ( no need to in-app route computing) We are targeting android **android** devices but we must be very cautious for future cross-platform compatibilities, that would be releasing the same application (with minimum of changes in both of UI and Logic of the application), for other platforms (iOS, Windows, Windows Phone). I considered using of PhoneGap, but by using PhoneGap, the only thing that is shared is UI. then I thought of using Xamarin, Xamarin is more like it, but the "OSMSharp" "**OSMSharp**" library has very very poor documentations. I fear using OSMSharp and being unable to solve problems that may occur during app development. And about mapbox, how is it? does it satisfy our needs? I'd like to benefit anyone's ideas who know something about these stuff.

We are in process of beginning a new project that needs to render offline maps of certain areas. Showing pre-computed (from a web-server source) routes are needed as well ( no need to in-app route computing) We are targeting android devices but we must be very cautious for future cross-platform compatibilities, that would be releasing the same application (with minimum of changes in both of UI and Logic of the application), for other platforms (iOS, Windows, Windows Phone). I considered using of PhoneGap, but by using PhoneGap, the only thing that is shared is UI. then I thought of using Xamarin, Xamarin is more like it, but the "OSMSharp" library has very very poor documentations. I fear using OSMSharp and being unable to solve problems that may occur during app development. And about mapbox, how is it? does it satisfy our needs? I'd like to benefit anyone's ideas who know something about these stuff.