# 肌肉速记背单词 vs World Flags

The clearest difference is update cadence: 肌肉速记背单词 at every 2 days against World Flags's every 14 months. 肌肉速记背单词 also leads on iOS requirement (12.0 vs 15.6). World Flags's advantage is device support (3 vs 1) and price ($0.99 vs $1.99). On ads and in-app purchases there is nothing between them.

肌肉速记背单词 costs $1.99 and World Flags $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

肌肉速记背单词 ships an update every 2 days, World Flags every 14 months. The most recent releases landed on October 15, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | 肌肉速记背单词 | World Flags |
| --- | --- | --- |
| Price | $1.99 | **$0.99** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 14 months |
| Size | 15 MB | 177 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [北京微格互动科技股份有限公司](https://appshunter.io/developer/1463740950) | [Two Intelligences, Inc.](https://appshunter.io/developer/1815997014) |

## What reviewers say

### 肌肉速记背单词

[App page](https://appshunter.io/ios/app/id6443745679)

**Features:** macOS Compatibility

**In-app purchases:** none


### World Flags

[App page](https://appshunter.io/ios/app/world-flags-geography/id6744041002)

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

**In-app purchases:** none


## Frequently asked questions

### Is 肌肉速记背单词 free?

肌肉速记背单词 costs $1.99, with no in-app purchases.

### Is World Flags free?

World Flags costs $0.99, with no in-app purchases.

### Do 肌肉速记背单词 or World Flags have ads?

Neither 肌肉速记背单词 nor World Flags shows ads.

### Which is updated more often, 肌肉速记背单词 or World Flags?

肌肉速记背单词 ships an update every 2 days, and World Flags every 14 months. Most recently, 肌肉速记背单词 was updated on October 15, 2026 and World Flags on October 17, 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.*