The floorplans are definitely transferable! Once you’ve mapped a location once, it works automatically on all devices.
In fact, if you walk into a location that someone else has already mapped, the “Where Am I” will automatically load that map up on your device and start showing your position.
If you’d like to do more advanced stuff with your floorplans, make a WiFiSLAM SDK account here (access.wifislam.com) and we can get you started.