A uniform glow over closed eyes plus steady noise removes the texture your senses normally lock onto. With nothing to fix on, the mind starts filling the blank — drifting imagery, color, sometimes more. This is the classic setup behind decades of anomalous-cognition research.
Before you start: use it seated or lying down, never while driving or moving. It can bring vivid imagery and mild disorientation — that's expected. Open your eyes and stop anytime. Headphones make the noise field work much better.
Max your screen brightness, put on headphones, lie back, and rest the phone where the glow fills your closed eyelids evenly. Tap during a session for controls.