# World Flags vs ReadableCalc

The clearest difference is in-app purchases: ReadableCalc at none against World Flags's 1. World Flags's advantage is update cadence (daily vs weekly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. World Flags sells 1 one-off in-app purchase. ReadableCalc asks for nothing beyond the download.

World Flags ships an update daily, ReadableCalc weekly. The most recent releases landed on October 9, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | World Flags | ReadableCalc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Daily** | Weekly |
| Size | 76 MB | 28 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Quang Tri Mai Nguyen](https://appshunter.io/developer/1626809833) | [YONAGARE LAB](https://appshunter.io/developer/1810986554) |

## What reviewers say

### World Flags

[App page](https://appshunter.io/ios/app/world-flags-dictionary-quiz/id6742062153)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove All Ads | $2.99 | one-time |


### ReadableCalc

[App page](https://appshunter.io/ios/app/readablecalc/id6747457253)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is World Flags free?

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

### Is ReadableCalc free?

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

### Do World Flags or ReadableCalc have ads?

Neither World Flags nor ReadableCalc shows ads.

### Which is updated more often, World Flags or ReadableCalc?

World Flags ships an update daily, and ReadableCalc weekly. Most recently, World Flags was updated on October 9, 2026 and ReadableCalc on October 7, 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.*