Symphonium music player and cast

I discovered the Symphonium music player and cast app from reading the forum here. It seems amazing for both playing from Jellyfin and local files. I am wondering if there are any ways to install the paid app other than using a burner google account, such as getting an apk from the developer. If so, I am wondering about updates. I haven’t installed any paid apps on my graphene phone yet, so any insights on your privacy/security strategies for installing paid apps would be appreciated.

Doesn’t sound like it.