# World's Key vs Aratc

World's Key and Aratc are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

World's Key ships an update every 8 days, Aratc every 2 weeks. The most recent releases landed on October 17, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | World's Key | Aratc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.8 (293 ratings)](https://appshunter.io/ios/app/worlds-key/id1494964110/reviews)** | — |
| Number of ratings | **293** | — |
| Positive reviews | 54.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 8 days** | Every 2 weeks |
| Monetization | Free | — |
| Size | 35 MB | 59 MB |
| Requires iOS | 16.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Mohammad Bzeih](https://appshunter.io/developer/1494964109) | [Hayder Ali](https://appshunter.io/developer/1849239781) |

## What reviewers say

### World's Key

[App page](https://appshunter.io/ios/app/worlds-key/id1494964110)

This interactive educational app offers audio-visual lessons and exercises for English and Science curricula for Kindergarten and Primary levels. Students can access engaging content and assessments through an online account, supplementing their printed books.

**Highlights:** Interactive audio-visual lessons, English and Science curricula, Kindergarten and Primary levels, Interactive exercises, Assessments for lessons, Online account access

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 👍 Educational value for students
- 😍 Highly praised by young students
- 👍 Useful for international schools
- 👍 Good content for learning
- 👍 App is beneficial for international students

**What reviewers complain about**

- 😡 App is very slow
- 😡 App crashes frequently
- 😡 App is not user-friendly
- 😡 App is old and outdated
- 😡 App is heavy and lags

**Reported bugs**

- App logs out when accessing videos
- App freezes and doesn't calculate views
- App has errors in exam time calculation
- App doesn't open
- App crashes when opening or solving lessons

**Requested features**

- Add video playback speed control
- Improve app's responsiveness and speed
- Continuous improvement and development of the app
- Fix bugs and glitches
- Update the app to be more modern


### Aratc

[App page](https://appshunter.io/ios/app/aratc/id1640463270)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is World's Key free?

World's Key is free to download, with no in-app purchases.

### Is Aratc free?

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

### Do World's Key or Aratc have ads?

Neither World's Key nor Aratc shows ads.

### Which is updated more often, World's Key or Aratc?

World's Key ships an update every 8 days, and Aratc every 2 weeks. Most recently, World's Key was updated on October 17, 2026 and Aratc on October 9, 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.*