If you have changed your phone / got a new phone from apple to apple or Android to Android then you do not need to pay for the app again as long as you sign in with the same account.
So on Android you sign in with the same google account as the previous phone.
If you change from Android to iOS(Apple) or vice versa, you will need to buy the app again. apple and Google handle the payments we don’t. There is no way around this, you will need to buy the app again as you have changed to a completely different build of the app. Don’t forget to first cancel the subscription on the previous device.
Cancel, Change or View your subscription
If you wish to change or cancel a subscription:
We are of course, sorry to see you go, and would appreciate your feedback on why you are cancelling.