Nyrin Alarm: Sleep Calculator

Going to bed now? Work out when to wake up, then set your alarm. Nyrin Alarm helps you plan tonight using your expected time to fall asleep and estimated sleep cycles. Choose your latest desired wake-up time, compare the options, and confirm a system alarm—all in one place. STILL AWAKE? ADJUST TONIGHT’S PLAN Recalculate from the current time when bedtime slips. Your existing alarm stays active until you confirm a replacement. MADE FOR YOUR BEDTIME ROUTINE • Calculate from now, with adjustable time to fall asleep and 1–6 estimated cycles. • See how each option compares with your target wake-up time. • Set one system alarm for tonight after confirming the time. • Use portrait or landscape on iPhone and an adaptive layout on iPad. • Choose light or dark appearance and any of seven interface languages. SIMPLE AND PRIVATE No account, ads, or subscriptions. Calculations run locally; your preferences and current plan stay on your device. A cycle is estimated at about 90 minutes. Actual sleep cycles vary. Nyrin Alarm does not track sleep, measure sleep stages, or guarantee how you will feel on waking. If no complete cycle fits before your target, the app clearly shows how much later the alarm would be. Requires iOS or iPadOS 26 or later. Creating a system alarm requires alarm permission.