Bedtime Calculator: Sleep

Wake up at the end of a sleep cycle, not in the middle of one. Coddle turns the time you need to be up into the bedtime that gets you there rested — then walks you down to it with a quiet wind-down instead of a jarring alarm.

Most sleep apps listen to you all night and hand you a graph in the morning. Coddle works the other way round: it plans the night before it starts. Tell it when you want to rise and it lays out three bedtimes built on 90-minute cycles, adds your own fall-asleep buffer, and reminds you when it is time to dim the lights. Log how the night actually went in a few taps, and a calm weekly chart shows whether you are paying down sleep debt or piling it up.

WHAT YOU GET
• Rise feeling clear instead of groggy by timing bedtime to the end of a full 90-minute cycle
• Pick the bedtime that fits tonight from three options for 4, 5 or 6 complete cycles
• Flip the calculator around when you are already in bed and see the best wake-up times ahead
• Actually get off your phone on time with a wind-down nudge 15 to 60 minutes before a soft bedtime cue
• Settle your breath and set down one line for the night in a two-minute guided wind-down
• Spot short nights before they turn into a rough week with a 7-night chart and a running sleep-debt figure

PERFECT FOR
• Early starts, exams and long commutes where the alarm is fixed and the bedtime has to bend
• Shift workers whose bedtime moves every few days
• Anyone who wakes up exhausted after eight hours and suspects the timing is wrong, not the amount
• People who know they should wind down earlier and just need a gentle push at the right minute

WHY NOT JUST SET AN ALARM?
An alarm only knows when you need to be up. It does not know that waking 20 minutes earlier, at the end of a cycle, would leave you sharper than sleeping longer. Coddle does the arithmetic in the evening so the morning takes care of itself, and it adds the part alarms skip entirely: helping you get to bed in the first place.

PRIVATE BY DEFAULT
Your bedtimes, moods, ratings and journal lines are stored only on this device. There is no account, no cloud sync, no advertising and nothing sent anywhere. Reminders are scheduled locally, so the app works fully offline.

FULL ACCESS
Coddle is a premium app. A subscription is required to use it: choose weekly or yearly auto-renewing, or a one-time lifetime purchase. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Payment is charged to your Apple ID account at confirmation of purchase. Manage or cancel any time in your App Store account settings.

Set tomorrow's wake time now, tuck in at the bedtime Coddle gives you, and see how different the morning feels.

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