This feature turns a passive playlist into an interactive, gamified social experience using your device's hardware.

: For those listening in public or via headphones, the app uses the microphone to detect "humming" or "sub-vocalizing." If it catches you vibrating your vocal cords to the beat, it triggers a loud, jarring buzzer.

: Syncs with smartwatches to track your BPM. Since these "annoying" songs are designed to be catchy, the feature sets a "Chill Zone" threshold. If your heart rate spikes during the chorus (indicating you’re getting into the groove), the app marks that song as a "Vulnerability Detected."