SleepRight: Sleep Calculator

Mornings feel brutal when your alarm goes off mid sleep cycle. SleepRight times them right.

Tell it when you have to wake up and it works backward through 90-minute sleep cycles (allowing time to fall asleep) to suggest the bedtimes that let you wake at the end of a cycle — so you rise rested instead of groggy. Going to bed right now? It flips around and shows the best wake times instead.

Then log how long you actually slept each night. SleepRight tracks your rolling 7-day sleep debt and nightly average, so you see the real trend instead of judging a single night.

WHY SLEEPRIGHT
• Cycle-based bedtime and wake-time suggestions, best option highlighted
• "Sleep now" mode for instant wake-time options
• 7-day sleep-debt balance and nightly average
• Set your own nightly target
• 100% offline — no account, no sign-up, works in airplane mode
• No ads, no tracking, no analytics — nothing leaves your device
• Pay once. Yours forever. No subscription.

Calm, distraction-free design built for the last thing you check at night and the first thing you check in the morning.

SleepRight is a planning and tracking aid based on common 90-minute-cycle guidance. Individual sleep needs vary; it is not medical advice or a sleep-disorder diagnostic.