Shuffly - Shuffle for Spotify is a free Android app developed by Jonatas Trafaniuc. It is a tool that allows Spotify users to generate unbiased shuffled playlists from their own playlists. The app randomly selects the order of songs without any criteria, providing a truly random shuffle experience.

With Shuffly, users can shuffle multiple playlists together and even create a carousel mix where the tracks from each playlist are played in sequence. This feature is particularly useful for small playlists, as unselected carousel playlists are treated as a single playlist within the carousel.

The app offers several features for free users, including the ability to generate playlists with up to 20 tracks, calculate the approximate duration of the playlist, mix multiple playlists to generate a shuffle, and save shuffles for later use. Shuffly also automatically alerts and ignores duplicated tracks.

For users who upgrade to the PRO version, additional features are available. These include the ability to generate shuffled playlists that include all tracks from the original playlist, set a limit on the number of tracks included in a shuffled playlist, update already generated playlists with new tracks, and use the app without displaying ads.

It is important to note that Shuffly does not play Spotify songs directly. Only Spotify Premium subscribers will be able to play music in the generated order.

Overall, Shuffly - Shuffle for Spotify provides a convenient and unbiased way for Spotify users to shuffle their playlists and enjoy a random listening experience.