The Cocoon Pro 3 holds 117 sounds, including white, brown, and green noise. Each of its three buttons can store one to nine of them, so once the subscription-free app has set things up, a press starts your routine without a phone. It doubles as a clock with a fade-in alarm, a display you can dim, switch off, or schedule, and an anti-glare night light. $59.99 in Light Gray or Graphite Black.