Sleep Cycles - FixSleep

FixSleep – Sleep Cycle Calculator & Relaxing Sounds
Wake up refreshed, not groggy. FixSleep is a smart sleep calculator that helps you align with your natural circadian rhythm and avoid sleep inertia, that heavy, tired feeling when you wake up at the wrong time.
By tracking the body’s 90-minute sleep cycles, FixSleep suggests the best times to fall asleep and wake up so you feel energized. Whether you’re heading to bed now or planning tomorrow’s routine, FixSleep gives you science-backed recommendations for better rest.
You’ll also find calming sleep sounds like rain, ocean waves, and brown noise, helping you relax and fall asleep faster.
Key Features
Smart Sleep Calculator – Get personalized sleep and wake-up times aligned with circadian rhythms.
Wake Up Refreshed – Minimize sleep inertia by waking up during light sleep stages.
Bedtime Reminders – Build consistent, healthy sleep habits.
Relaxing Sleep Sounds – Fall asleep faster with rain, waves, white noise and more.
Offline Mode – Listen to sounds anywhere, no internet required.
Modern Design – Minimal, easy-to-use interface with dark mode.
Multilingual – Available in English and French.
How It Works
Your sleep follows 90-minute cycles through light sleep, deep sleep, and REM. Waking up in the wrong phase leads to sleep inertia, grogginess that can last hours.
FixSleep calculates the best bedtimes and wake-up times, helping you stay in sync with your circadian rhythm so you rise feeling energized, alert, and ready for the day.FixSleep is more than a sleep calculator. It’s your guide to healthy circadian rhythms and better mornings.