I thought my idea of having a test Jasonette app where you put the url from the app after the boot to do your testing could be very easily doable and way not it could allow also to test the various existing apps that OP created: he could create a test app that downloads a list of his demo apps (so it is always up to date), show a dropdown or similar to choose the demo app + allow you to specify your own custom test url using the keyboard of the device. In this way you have both a demo and a test application :)
In practice, it's very easy to do.
This is how many UX Prototyping apps, like Invision or Origami works. You download the Origami Studio iPhone app, input in the URL of your prototype, and it loads it into it.
This is an excellent solution for getting up and running with Jasonette without a Mac.
In fact, I first created Jason about 5 months ago, and have since been working on open sourcing it, which became Jasonette.
One warning though, note that this current version of Jason is not completely up to date with the most recent version of Jasonette (I've been too busy trying to release the open source), which means about 95% of the apps should work but not all. I plan to push an update soon, please follow the project or join the slack channel to stay updated :)