Sounded interesting, so I installed it only to be prompted by a "Sign in with Spotify" button and nothing else.
The website should mention that it requires Spotify. And it is unfortunate that it does.
Thank you. I too lack spotify, gleefully.
Sorry for that! We decided to focus on Spotify first due to its large userbase and mention it in the app description but I agree, it should definitely be on the main website too!