Free sleep tools
Work out a bedtime or a wake-up time in whole sleep cycles, or hear how white, pink and brown noise differ. No app required to try these.
Sleep cycle calculator
Wake-up or bedtime options in whole 90-minute cycles.
Bedtime calculator
Count back from a wake-up time to a bedtime that lands you at a cycle's end.
White vs pink vs brown noise
Play each and see the spectrum, with the research on what actually helps.
Free at launch. One download for iPhone, iPad and Apple TV.