# Sleep Cycle Bedtime Calculator vs StepNudge

The clearest difference is in-app purchases: StepNudge at none against Sleep Cycle Bedtime Calculator's 4. StepNudge also leads on iOS requirement (16.0 vs 18.0). On price, ads and device support there is nothing between them.

Both are free to download. Sleep Cycle Bedtime Calculator sells 3 in-app purchases, starting at $4.99 per year. StepNudge asks for nothing beyond the download.

## The numbers

| Metric | Sleep Cycle Bedtime Calculator | StepNudge |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.1 (300 ratings)](https://appshunter.io/ios/app/sleep-cycle-bedtime-calculator/id1668639153/reviews)** | — |
| Number of ratings | **300** | — |
| Positive reviews | 80.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | — |
| Monetization | Free | — |
| Size | 35 MB | 2 MB |
| Requires iOS | 18.0 | **16.0** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Kai Oelfke](https://appshunter.io/developer/644779478) | [Klaus Hansen](https://appshunter.io/developer/1680398886) |

## What reviewers say

### Sleep Cycle Bedtime Calculator

[App page](https://appshunter.io/ios/app/sleep-cycle-bedtime-calculator/id1668639153)

This app helps you determine optimal wake-up and bedtime based on sleep cycles. It calculates ideal times to go to sleep and wake up to feel more refreshed, considering the average 90-minute sleep cycle duration. You can also customize your estimated time to fall asleep.

**Highlights:** Calculate optimal wake-up times, Calculate optimal bedtime, Based on 90-minute sleep cycles, Supports 5-6 sleep cycles, Customizable fall asleep time, Apple Watch support

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SleepCalc Pro Yearly | $4.99 | per year |
| SleepCalc Pro Yearly | $4.99 | per year |
| SleepCalc Pro | $9.99 | one-time |

**What reviewers like**

- 🆓 Completely free with no ads or data collection
- 👍 Simple and intuitive user interface
- 🎯 Accurate sleep cycle calculations based on 90-minute cycles
- ⚡ Quick and easy to use
- 📊 Shows multiple sleep time options and highlights best choices

**What reviewers complain about**

- 😕 Confusing interface for some users
- 🐛 Unresponsive touch controls reported
- 📉 Lacks visual graphs and data visualization
- ❌ No detailed sleep analysis or insights
- 🔄 Settings reset when app is closed

**Reported bugs**

- Touch screen unresponsive
- App settings reset upon closing
- Alarm goes off at unintended times
- Skips certain time slots in calculations
- Confusing icon similarity with Apple Watch app

**Requested features**

- Add graphs and visual data representations
- Integrate with Apple Health or Fitbit data
- Display number of sleep cycles achieved
- Built-in alarm functionality
- Persist settings when closing app


### StepNudge

[App page](https://appshunter.io/ios/app/stepnudge/id6775414935)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Sleep Cycle Bedtime Calculator free?

Sleep Cycle Bedtime Calculator is free to download, with in-app purchases available.

### Is StepNudge free?

StepNudge is free to download, with no in-app purchases.

### Do Sleep Cycle Bedtime Calculator or StepNudge have ads?

Neither Sleep Cycle Bedtime Calculator nor StepNudge shows ads.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*