Did you purchase via google play store? If so, the upgrade is linked to your google play account (not the app sign in account). You can enable the upgrade on all android devices as long as they are in sync with the right google play account.
When you purchase via itunes store, the upgrade is linked to your apple account. You can enable the upgrade on all your ios devices as long as they are in sync with the same apple account.
Because of different App ecosystems, the licenses do not transfer over, but the Apple and Android apps communicate with each other for video security