> Can I continue to use Xamarin when my subscription expires?

> Yes you can. Your Xamarin license is perpetual. If you choose not to renew your subscription, you will no longer have access to new releases and support, and we will be very sad.

In other words, the Xamarin model is the same as RubyMotion. If you don't pay after the first year, you can continue to build as many apps as you want, you just won't receive any support or new releases.