# 认知卡认识国旗 vs World

The clearest difference is in-app purchases: 认知卡认识国旗 at none against World's 2. 认知卡认识国旗 also leads on ads (none vs shown) and iOS requirement (10.1 vs 15.6). World's advantage is update cadence (every 2 months vs every 26 months). On price and device support there is nothing between them.

Both are free to download. World sells 2 in-app purchases, starting at $1.99 per month. 认知卡认识国旗 asks for nothing beyond the download.

认知卡认识国旗 ships an update every 26 months, World every 2 months. The most recent releases landed on October 19, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | 认知卡认识国旗 | World |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (2 ratings)](https://appshunter.io/ios/app/id698034578/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 26 months | **Every 2 months** |
| Size | 28 MB | 147 MB |
| Requires iOS | **10.1** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [运涛 余](https://appshunter.io/developer/977049266) | [Olga Ivanova](https://appshunter.io/developer/1733570435) |

## What reviewers say

### 认知卡认识国旗

[App page](https://appshunter.io/ios/app/id698034578)

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

**In-app purchases:** none


### World

[App page](https://appshunter.io/ios/app/world-flags/id6758343689)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| flags_by_oliva_subscription | $1.99 | per month |
| flags_by_oliva_donation | $1.99 | one-time |


## Frequently asked questions

### Is 认知卡认识国旗 free?

认知卡认识国旗 is free to download, with no in-app purchases.

### Is World free?

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

### Do 认知卡认识国旗 or World have ads?

World shows ads; 认知卡认识国旗 does not.

### Which is updated more often, 认知卡认识国旗 or World?

认知卡认识国旗 ships an update every 26 months, and World every 2 months. Most recently, 认知卡认识国旗 was updated on October 19, 2026 and World 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.*