Licence transfer from Android to iOS?

Hi, can someone tell me if it is possible to transfer the purchased Litchi (at google play) to Apple iOs? Thx!

See the Litchi Help site, FAQ:

10. I purchased the app on one device, can I install it on other devices?

You can install the app on as many devices as you want as long as they use the same platform and the same “main” account (Google, Apple or Amazon) that was used for the original purchase. If you wish to use Litchi on two or more platforms you will need to purchase it on each one.