I tried to subscribe for updates but it required me to "prove that I am a human". I could not see any captcha or any other similar thing and it would not allow me to submit the form. I'm using Firefox focus on Android

BTW, there is nothing wrong with intending to advertise. Op (and I) are looking for a call recording app, and you know if one that you can (hopefully) recommend. The fact that you profit if we use it doesn't make your suggestion that much worse