You do have LiveCode, don't you?

If you haven't yet installed LiveCode, go to this web page: http://www.runrev.com/downloads/. You will need to create an account to be able to download the trial version. If you plan to go on to buy LiveCode, read through this page: http://www.runrev.com/products/livecode/license-types-overview/ to understand the many license variations there are. As a rough guide, based on the price at the time of writing, to create mobile applications that are free, it would be $99, or if you wanted to make apps that you could charge for, it would be $499. Each extra platform that you want to publish to would be another $99.

Once you have downloaded the trial version, or bought one of the licenses, why not go ahead and launch it!