So what device are you putting it on?

Tivimate is exclusively Android, could emulate on PC with bluestack or something. But i bet there are easier options.

I did this tonight. Install Bluestacks Emulator on your Windows PC. It’s free and includes the Google Play Store. Download the TiviMate Companion app and you can subscribe to premium.

Ask around for an old android phone someone has replaced. I found an old one I run on wifi just for that purpose and they were happy just to take it out of their junk drawer.

Yes, you will have to install BlueStacks on a PC and then use a google account to install the companion app and subscribe. Purchase the lifetime license is much easier.