If you have a Dual GPS 150 or 160, apparently you can use the SkyPro status app (also from Dual) as a mock gps app. Since RC can connect o the Dual 150 directly, why bother with a mock GPS app?
Maybe if someone had a good explanation of what a "mock GPS" is, and why you might use it would explain everything. I haven't read anything that makes sense.
I have been using Bluetooth GPS as a mock GPS app.