Kuratr uses cookies to store information about your current session. This includes the tokens that allow Kuratr to use your account to interact with Spotify, and the type of Spotify account (free vs premium). Interacting with Spotify (logging in and playing audio) also results in Spotify setting cookies.
Logging in to Spotify requests you to approve the following permissions ("scopes"), for the following reasons:
The Kuratr database stores information about the playlists that you create, and uses your Spotify username (not your email address) to associate those playlists with your account. No other personally identifiable information is stored in the database.
The database and backups are currently stored in the UK and Ireland.