The idea is that the projects that you make in Fl Studio Mobile are totally interchangeable with the plugin making the mobile app very desirable for FL Studio owners. Happy to report that the new version 3 are according to official sources going to be a free upgrade...
Here is what is said on their website about the Beta:
Welcome to the FL Studio Mobile 3 FL Studio Plugin.
You can now test the FL Studio FL Native version of FL Studio Mobile as a plugin. This is how we aim to allow users to work to and from the mobile version. In future we will enable 16-channel audio output from the plugin and allow drag-n-drop of MIDI / Audio data between the two.
The plan: The FL Studio Plugin version will be included Free to all FL Studio users of FL Studio Producer Edition (and up). As usual, we reserve the right to change these terms. So if you own FL Studio Mobile and register it to your IL account prior to a change-of-mind on our part, you will continue to own the FL Plugin version should we decide to sell it as an add-on purchase (for which we have no plan at the moment). Put simply: Everyone using producer edition and up, gets this plugin for free. Registering your mobile version to your IL account will guarantee it stays that way for you.
To get the Beta go here: