In certain countries, pairs who live at the same address are eligible to sign up for Spotify 'Duo,' which allows for two separate Spotify Premium accounts to be paid for with a single bill. Duo is a more cost-effective option for two people who want to maintain their own Spotify Premium accounts but do not want to pay the additional cost of a family plan.
While Duo will particularly appeal to couples, it also has the potential to save friends money, so long as they are living under the same roof, as the terms of Spotify Duo specify.
Duo gives users the ability to share their playlists with a partner if desired, making it easier to listen to music that both people enjoy. Spotify Duo also includes a special playlist called Duo Mix, which is regularly updated with songs that both parties will like.