Deep brown noise, structured pink noise, and ultra-steady focus sounds — the background audio many people with ADHD find helpful for concentration, studying, and deep work. Episodes in Pomodoro (25 min), deep-work (50 min), and extended (2-4 hour) lengths so you can match your session. Every episode is perfectly steady — no variation, no surprises, just consistent sound that stays out of your way. These are background sounds, not medical treatment for ADHD. If you have concerns about attention or focus, please consult a healthcare provider.