Paid Apps can't be transferred between Android, iOS and Windows devices. This also applies to in-app purchases. To use FL Studio Mobile on another operating system you must purchase it and additional content for each of Android, iOS, and Windows separately. This is true for all paid mobile apps. Yes, we know that sucks and here's why it happens:
The Apple App Store (iOS), Google Play Store (Android) and Windows App (Windows) stores are run by competing companies - Google, Apple & Microsoft. There is no store-provided mechanism to register an existing Android, iOS or Windows App purchase with a competing App store. So, there’s no way to unlock a free copy of FL Studio Mobile on one App store based on your purchase on another App store. In fact, there are contractual restrictions preventing us unlocking an App by some back-door method. Put simply, each side is trying to lock you into their platform, that's their business and their right.
A fact not often clear to customers: Your purchase was from Apple, Google or Microsoft, not from Image-Line. It's just like buying milk, on the shelf in a supermarket, the stores gives some shelf-space and a percentage of the sale to the dairy, but everything else is in the stores hands. Similarly, we upload FL Studio Mobile to the respective App stores, but we have no ability to control how App stores function or the rules covering how the App is sold, unlocked, and even how the App can function. So, just like the dairy doesn't know you are drinking their milk, we don't even know you purchased FL Studio Mobile, until you register it with us.
If you have more questions, please ask in the FL Studio Mobile forum. In-app, tap HELP > Users and Support Forums.
Image-Line Support Team