# World's Key vs EDDIE

The clearest difference is update cadence: EDDIE at every 2 days against World's Key's every 8 days. EDDIE also leads on iOS requirement (14.0.0 vs 16.6). On price, ads, in-app purchases and device support there is nothing between them.

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, EDDIE every 2 days. The most recent releases landed on October 21, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | World's Key | EDDIE |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.8 (316 ratings)](https://appshunter.io/ios/app/worlds-key/id1494964110/reviews)** | — |
| Number of ratings | **316** | — |
| Positive reviews | 54.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 days | **Every 2 days** |
| Monetization | Free | — |
| Size | 35 MB | 26 MB |
| Requires iOS | 16.6 | **14.0.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Mohammad Bzeih](https://appshunter.io/developer/1494964109) | [Derrick Beech](https://appshunter.io/developer/1885917929) |

## 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- 😡 App is old and outdated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


### EDDIE

[App page](https://appshunter.io/ios/app/eddie-prostate/id6780092180)

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

**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 EDDIE free?

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

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

Neither World's Key nor EDDIE shows ads.

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

World's Key ships an update every 8 days, and EDDIE every 2 days. Most recently, World's Key was updated on October 21, 2026 and EDDIE on October 14, 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.*