Got this email in response to an enquiry about how much their software would cost. I hate software that I might buy but I have to tease the price out of them first.

"Rhodes is open source and can be used without charge for apps that don’t require certain enterprise features running on consumer smartphones and tablets.
The other parts of the RhoMobile suite are licensed.
Currently the licence-model is based on a per-user/app basis, but this will change to a per-developer-subscription model in the near-future, so we would appreciate the opportunity to discuss your intended use and your project plan/timescales and share the future pricing with you."