You might suggest to the audioteka app makers that they want to be part of the Sonos ecosystem. You could have them start by reading the Sonos partners page.

Hi @Fajfos, welcome to the Sonos Community!

Audioteka isn’t a service that is available on Sonos, so you wont be able to play it using the Sonos app.

However you could cast the audio to Sonos from your Android if you have a Bluetooth Sonos speaker.

I hope this helps!