We are unable to offer transfers of iReal Pro between any of the Android, iOS and Mac versions.
The Google, iOS and Mac App Stores are each separate entities with separate billing and accessed specifically within each device. The two Apple stores (for iOS and Mac) do not offer transfers between themselves either. (You can contact Apple and request them to create a bundle for iOS & Mac apps.)

As you will probably understand, the development of the app code is also different for each of the three (even between Apple iOS and Apple Mac).

We receive limited amount of promo codes so we can't fulfill the transfers between the different platforms.

Thank you for your understanding!