LullCycle: Sleep Cycle Alarm
Sleep cycle bedtime tracker
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
LullCycle tells you the smartest time to go to bed tonight — computed from real sleep science, not vague advice.
Sleep moves in roughly 90-minute cycles. Wake up mid-cycle and you feel groggy; wake at a cycle boundary and the same amount of sleep feels lighter. LullCycle does the math for you: set your wake-up time and instantly see the bedtimes that land your alarm between cycles.
WHY SLEEPERS CHOOSE LULLCYCLE
• One-tap bedtime calculator, timed to ~90-minute cycles + realistic fall-asleep time
• Night score for every night — duration, cycle alignment and timing, transparently computed
• 7-day sleep debt that shows exactly how far behind you are
• Consistency streaks that reward a steady schedule
• 100% on-device and offline — your sleep data never leaves your phone
OPEN AND USE IT — HONESTLY
No forced trial to open the app. No credit card wall. The bedtime calculator and sleep log are free, forever. LullCycle Plus is an optional subscription — clearly priced, cancel anytime.
LullCycle Plus (optional subscription)
• Auto-renewing monthly or yearly subscription
• Payment charged to your Apple ID at confirmation of purchase
• Renews automatically unless canceled at least 24h before the period ends
• Manage or cancel anytime in your App Store account settings
MEDICAL DISCLAIMER
LullCycle is not a medical device and does not provide medical advice, diagnosis or treatment. Sleep information and scores are for general wellness purposes only. Always consult your doctor about sleep disorders or before making any health decisions.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://lullcycle.com/privacy
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
New night artwork on the home screen, and clearer diagnostics behind the scenes so purchase problems can be spotted and fixed quickly.
The developer, Tony AI, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Purchases
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- BIGAI MEDIA JOINT STOCK COMPANY
- Size
- 59 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 15.1 or later.
- iPhone
Requires iOS 15.1 or later. - iPod touch
Requires iOS 15.1 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
9+
- 9+
- Contains
Health or Wellness Topics
- In-App Purchases
Yes
- LullCycle Plus Annual $49.99
- LullCycle Plus Monthly $4.99
- Copyright
- © 2026 BIGAI MEDIA JOINT STOCK COMPANY