# Sun to Moon Sleep Clock vs TwinClock

The clearest difference is update cadence: TwinClock at every 5 days against Sun to Moon Sleep Clock's every 2 months. TwinClock also leads on price ($0.99 vs $2.99). On review sentiment, ads, in-app purchases and device support there is nothing between them.

Sun to Moon Sleep Clock costs $2.99 and TwinClock $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Sun to Moon Sleep Clock ships an update every 2 months, TwinClock every 5 days. Both last shipped on October 29, 2026.

## The numbers

| Metric | Sun to Moon Sleep Clock | TwinClock |
| --- | --- | --- |
| Price | $2.99 | **$0.99** |
| Rating | **[4.5 (107 ratings)](https://appshunter.io/ios/app/sun-to-moon-sleep-clock/id1052898458/reviews)** | — |
| Number of ratings | **107** | — |
| Positive reviews | 94.1% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 days** |
| Monetization | **Free** | Paid |
| Size | 52 MB | 97 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Michael Sibley](https://appshunter.io/developer/1052898457) | [Oxegena Sarl](https://appshunter.io/developer/6783738039) |

## What reviewers say

### Sun to Moon Sleep Clock

[App page](https://appshunter.io/ios/app/sun-to-moon-sleep-clock/id1052898458)

This app acts as a gentle sleep trainer for young children, visually indicating when it's time to stay in bed and when it's okay to wake up. It offers customizable features like sleep sounds, nap timers, and a reward system to encourage good sleep habits.

**Highlights:** Visual star countdown for bedtime, Customizable sleep and wake sounds, Nap timers and bedtime routine tools, Personalizable characters with outfits, Optional Snooze Rewards system, Visual shooting-star progress bar, PIN-protected settings

**Features:** macOS Compatibility

**In-app purchases:** none


### TwinClock

[App page](https://appshunter.io/ios/app/twinclock/id1548594686)

This app helps toddlers develop better sleep habits by visually signaling when it's time to wake up. It uses fun animations and a reward system to encourage children to wait for the sun to appear before leaving their beds.

**Highlights:** Customizable wake-up time, Optional unlock code, Fun graphics and animations, Works on various devices, No special permissions needed, Reward program for children

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Sun to Moon Sleep Clock free?

Sun to Moon Sleep Clock costs $2.99, with no in-app purchases.

### Is TwinClock free?

TwinClock costs $0.99, with no in-app purchases.

### Do Sun to Moon Sleep Clock or TwinClock have ads?

Neither Sun to Moon Sleep Clock nor TwinClock shows ads.

### Which is updated more often, Sun to Moon Sleep Clock or TwinClock?

Sun to Moon Sleep Clock ships an update every 2 months, and TwinClock every 5 days. Most recently, Sun to Moon Sleep Clock was updated on October 29, 2026 and TwinClock on October 29, 2026.

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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.*