# Kid Study vs Language world

The clearest difference is in-app purchases: Language world at none against Kid Study's 5. Language world also leads on update cadence (weekly vs monthly) and iOS requirement (11.0 vs 15.5). On price, ads and device support there is nothing between them.

Both are free to download. Kid Study sells 5 one-off in-app purchases. Language world asks for nothing beyond the download.

Kid Study ships an update monthly, Language world weekly. The most recent releases landed on September 20, 2026 and March 8, 2026 respectively.

## The numbers

| Metric | Kid Study | Language world |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Weekly** |
| Size | 24 MB | 17 MB |
| Requires iOS | 15.5 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jen Hsien Chen](https://appshunter.io/developer/1576491016) | [pcltd](https://appshunter.io/developer/1457816117) |

## What reviewers say

### Kid Study

[App page](https://appshunter.io/ios/app/kid-study/id1613678208)

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Animal Full Version | $0.99 | one-time |
| Food Full Version | $0.99 | one-time |
| Items Full Version | $0.99 | one-time |
| World, Environment & Nature Full | $0.99 | one-time |
| Full Version | $2.99 | one-time |


### Language world

[App page](https://appshunter.io/ios/app/language-world/id1645870913)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Kid Study free?

Kid Study is free to download, with in-app purchases available.

### Is Language world free?

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

### Do Kid Study or Language world have ads?

Neither Kid Study nor Language world shows ads.

### Which is updated more often, Kid Study or Language world?

Kid Study ships an update monthly, and Language world weekly. Most recently, Kid Study was updated on September 20, 2026 and Language world on March 8, 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.*