Nighty: Sleep Cycle Calculator

Sleep Timing, Simplified

Only for iPhone

Free · Designed for iPhone. Not verified for macOS.

iPhone

Nighty is a calm sleep cycle calculator to help you time your sleep with ease. No tracking, no accounts, no setup — just a simple nightly tool that suggests gentle times to sleep or wake. Two simple modes Wake-up mode Know when you need to wake up? Nighty suggests bedtimes aligned with natural sleep cycles. Bedtime mode Going to sleep now? Nighty shows wake-up times that land near cycle boundaries. Built around sleep cycles Sleep typically occurs in ~90-minute cycles. Waking near the end of a cycle can feel easier than waking in the middle of deep sleep. Nighty suggests times based on this model — a helpful guide, not medical advice. Accounts for sleep latency The time it takes you to fall asleep (“sleep latency”) is factored into each calculation. You can adjust this in Settings if you tend to fall asleep faster or slower than average. Multiple options, clearly presented Starting from your chosen time, Nighty shows several cycle options so you can decide what works for your night. Five cycles (~7.5 hours) are gently highlighted by default as a common full-night duration, but you’re free to choose what fits your schedule. Simple by design • Instant answers • No journaling • No sleep tracking hardware • No personal data required Nighty is built around a single purpose: helping you time your sleep. Private and offline All calculations happen on-device. No data is collected. Thoughtful details • Calm, night-friendly interface • Subtle, atmospheric animations • Pull to refresh based on the current time • Full support for VoiceOver, Dynamic Type, and Reduce Motion

Ratings & Reviews

  • 5.0
    out of 5
    4 Ratings

Personalize Your Highlighted Cycle • Choose which sleep cycle to highlight by default — pick the number of cycles that works best for your schedule. Rate Nighty & Get Support • Enjoying the app? Leave a rating right from Settings. Need help? Tap to send a support email. Easier Settings Dismissal • Added a Done button to the Settings sheet so it's always easy to close.

Version 1.1

The developer, Jonathan Toussaint, 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 Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    The developer indicated that this app supports the following accessibility features. Learn More

    • Supported Features

      • VoiceOver

      • Dark Interface

      • Differentiate Without Color Alone

      • Sufficient Contrast

      • Reduced Motion

    Information

    Seller
    • Jonathan Toussaint
    Size
    • 4.4 MB
    Category
    • Health & Fitness
    Compatibility
    Requires iOS 18.0 or later.
    • iPhone
      Requires iOS 18.0 or later.
    • Mac
      Requires macOS 15.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 2.0 or later.
    Languages
    • English
    Age Rating
    9+
    Copyright
    • © 2026 Jonathan Toussaint
  • Developer Website
  • Privacy Policy

    • You Might Also Like