# Nighty: Sleep Cycle Calculator — Sleep Timing, Simplified

> Simple sleep cycle calculator for timing sleep and wake-up. (iPhone/iPad app by Jonathan Toussaint.)

- Source: https://appshunter.io/ios/app/nighty-sleep-cycle-calculator/id6749608617 (this page in markdown: same URL + `.md`)
- Developer: [Jonathan Toussaint](https://appshunter.io/developer/1831434098)
- Category: Health & Fitness, Utilities
- Price: Free
- Rating: 5.00/5 from 4 App Store ratings
- Age rating: 4+
- Requires: iOS 18.0 · 4 MB
- Languages: English
- Released: 2026-03-03
- Data updated: 2026-06-10
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/nighty-sleep-cycle-calculator/id6749608617/reviews.md

## What is Nighty?

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

## Key features

- Sleep cycle-based timing
- Wake-up mode
- Bedtime mode
- Accounts for sleep latency
- Multiple timing options
- Offline and private operation
- Calm interface


## Frequently asked questions about Nighty

### How does Nighty calculate sleep cycles?

Nighty suggests sleep and wake times based on the model of natural sleep cycles, which typically occur in approximately 90-minute periods. Waking near the end of a cycle is generally perceived as easier than waking during deep sleep.

### Does Nighty track my sleep?

No, Nighty does not track your sleep. It is designed as a simple calculator that provides suggested times without requiring any journaling, sleep tracking hardware, or personal data.

### Is Nighty private and secure?

Yes, Nighty is designed for privacy. All calculations are performed on-device, and no personal data is collected or shared.

### What is 'sleep latency' and how does Nighty use it?

Sleep latency is the time it takes for you to fall asleep. Nighty factors this into its calculations and allows you to adjust it in the settings if your typical sleep latency differs from the average.

### Can I customize the wake-up times suggested by Nighty?

Yes, Nighty presents multiple cycle options starting from your chosen time. While five cycles (approximately 7.5 hours) are highlighted by default, you are free to choose the duration that best fits your schedule.

### What devices does Nighty support?

Nighty is currently supported on iPhone devices.

### How often is Nighty updated?

The latest version of Nighty is 1.1, and it was last updated on March 30, 2026. This suggests a recent update, indicating ongoing development and support.

### What is the user rating for Nighty?

Nighty has received an excellent rating of 5.0 stars from 4 ratings, indicating a very positive reception from its users.

## Version history (last 2 releases)

### 1.1 — 2026-03-30

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.

### 1.0 — 2026-03-03

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*