@bolts This is the Open Source App for Windows, Mac, & Linux. Although similar to the Android and iOS apps, it is not the same app. But just like the Android and iOS version it does work well for "this is spot/block spraying weeds etc. and not high accuracy sowing etc." The Dual Electronics XGPS150 bluetooth antenna last I saw still works with the iOS app. As an open source project we hope to have people experiment with some higher accuracy antenna systems to advance this project. Thanks for checking it out. Hopefully we can do a write up one of these days comparing/testing some other antenna options.