# chrtz vs Sleepy Train

The clearest difference is in-app purchases: chrtz at none against Sleepy Train's 1. chrtz also leads on update cadence (weekly vs every 2 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Sleepy Train sells 1 one-off in-app purchase. chrtz asks for nothing beyond the download.

chrtz ships an update weekly, Sleepy Train every 2 weeks. The most recent releases landed on October 15, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | chrtz | Sleepy Train |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/sleepy-train-calm-bedtime/id6790432281/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 weeks |
| Monetization | — | Paid |
| Size | 59 MB | 615 MB |
| Requires iOS | 16.2 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Sungsu Choi](https://appshunter.io/developer/1718370500) | [Record Creative Co. LLC](https://appshunter.io/developer/1827706030) |

## What reviewers say

### chrtz

[App page](https://appshunter.io/ios/app/chrtz/id6757950661)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Sleepy Train

[App page](https://appshunter.io/ios/app/sleepy-train-calm-bedtime/id6790432281)

This app helps children establish a calming bedtime routine through interactive play with a train character. It addresses big feelings and teaches breathing exercises, making bedtime a peaceful experience for both child and parent. The content is fully spoken and designed for independent use by young children.

**Highlights:** Interactive bedtime ritual, Emotional regulation tools, Guided breathing exercises, Fully spoken content, Offline functionality, Ad-free experience

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sleepy Train - Full Unlock | $4.99 | one-time |


## Frequently asked questions

### Is chrtz free?

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

### Is Sleepy Train free?

Sleepy Train is free to download, with in-app purchases available.

### Do chrtz or Sleepy Train have ads?

Neither chrtz nor Sleepy Train shows ads.

### Which is updated more often, chrtz or Sleepy Train?

chrtz ships an update weekly, and Sleepy Train every 2 weeks. Most recently, chrtz was updated on October 15, 2026 and Sleepy Train on October 21, 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.*