I downloaded the Threema App with Aurora store using my Google account data that I used quite some time ago to buy the app. This and the installation went fine but when starting the app it says that the purchase could not be verified.
I tried adding a Google device account but that didn´t help. Contacted the developer but they say they don´t support purchases not made by official distribution ways.
I read here that people do use the app and therefore I am asking for help to solve this issue.