Here frequently asked questions are summarized.
Serial GPS receivers are supported on Windows 7 desktop and newer. Cartograph also supports USB and Bluetooth receivers which simulate a virtual serial port. Note: the Windows Store version does not support external GPS receivers.
Yes. Maps and overlays which are stored on the SD card are not copied to the app storage. Files which are located on the phone's external storage are copied to the app directory.
The Windows Store version supports internal GPS receivers only. The desktop version supports serial and Bluetooth GPS receivers only. The desktop version is not limited by sandboxing and thus allows more relaxed file operations (for instance maps need not to be copied). Generally, if you do not require access to the internal GPS receiver then we recommend to use the desktop version.
Yes. The drawing and editing feature is available on all platforms.
Yes. Background GPS track recording is supported on all platforms.
Windows Phone 8.1 is not supported due to technical reasons (WP 8.1 does not support background GPS tracking which is a vital feature of the Cartograph app).