A dedicated blocker fits when opening Spotify has become an excuse to check something, not to hear something. If you're honest that you rarely just play a song and move on, a default-off rule removes the opening that leads to browsing. If you are still deciding whether a blocker is the right tool at all, see our iPhone app-blocking options.
With Fella, add Spotify to the apps you want blocked. It stays unavailable by default while the apps you did not select remain accessible.
Use the emergency unlock only for a practical need. Each blocking session includes one 5-minute emergency unlock, enough to start a specific playlist before a workout or a call. When the five minutes end, Spotify locks again automatically.
That is the trade-off, and it's worth restating clearly. Blocking Spotify blocks the app, including the moments you genuinely need quick, intentional access to music. If that's most of your usage, a scheduled Downtime window for specific browsing-prone hours may serve you better than an all-day default block.