# world general knowledge vs U.S. Citizenship Test Prep

The clearest difference is in-app purchases: world general knowledge at none against U.S. Citizenship Test Prep's 1. world general knowledge also leads on update cadence (every 2 months vs every 66 months) and iOS requirement (6.0 vs 9.0). On price, ads and device support there is nothing between them.

Both are free to download. U.S. Citizenship Test Prep sells 1 one-off in-app purchase. world general knowledge asks for nothing beyond the download.

world general knowledge ships an update every 2 months, U.S. Citizenship Test Prep every 66 months. The most recent releases landed on September 14, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | world general knowledge | U.S. Citizenship Test Prep |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 66 months |
| Size | 39 MB | 19 MB |
| Requires iOS | **6.0** | 9.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [rahul baweja](https://appshunter.io/developer/804610215) | [Anjian Yu](https://appshunter.io/developer/1404869329) |

## What reviewers say

### world general knowledge

[App page](https://appshunter.io/ios/app/world-general-knowledge/id1055937879)

**Features:** macOS Compatibility

**In-app purchases:** none


### U.S. Citizenship Test Prep

[App page](https://appshunter.io/ios/app/us-citizenship-test-prep/id1474029223)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Version | $9.99 | one-time |


## Frequently asked questions

### Is world general knowledge free?

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

### Is U.S. Citizenship Test Prep free?

U.S. Citizenship Test Prep is free to download, with in-app purchases available.

### Do world general knowledge or U.S. Citizenship Test Prep have ads?

Neither world general knowledge nor U.S. Citizenship Test Prep shows ads.

### Which is updated more often, world general knowledge or U.S. Citizenship Test Prep?

world general knowledge ships an update every 2 months, and U.S. Citizenship Test Prep every 66 months. Most recently, world general knowledge was updated on September 14, 2026 and U.S. Citizenship Test Prep on September 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.*