It's an Electron app, so it should build for Windows without too much trouble. If you're interested, give it a shot and let us know how it goes :) None of us are Windows experts, so happy to take any pull requests for Windows support. (Or even Linux)
Linux support would be awesome too. Based on our beta, we got twice as many signups for Windows as Linux, so we're probably gonna prioritize Windows support unless we get a lot of sudden Linux interest.
Sorry, not being hostile. Just curious why someone would use React Native if they don't have a Mac to build/test on iOS. Why not just go straight to Android?