* Spotify Premium is required to use this app
Songstack is a Spotify-integrated music discovery app that gives control back to the listener.
The app asks you to swipe to 'like' or 'dislike' every song that you hear, and in turn future recommendations will become more accurate to your taste.
Furthermore, you are able to 'tune' any of your Stacks (by their 'acousticness', 'danceability' etc.) in order to have even more control over what kind of songs you encounter.