# Proportion Solver vs 世界の国名クイズ

The clearest difference is update cadence: 世界の国名クイズ at every 10 days against Proportion Solver's every 6 weeks. Proportion Solver's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Proportion Solver ships an update every 6 weeks, 世界の国名クイズ every 10 days. The most recent releases landed on October 5, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Proportion Solver | 世界の国名クイズ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/proportion-solver/id1532616220/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 6 weeks | **Every 10 days** |
| Monetization | Ad-supported | — |
| Size | 47 MB | 4 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Francesco Varotti](https://appshunter.io/developer/1501752853) | [Masahiro Tanigawa](https://appshunter.io/developer/6792176111) |

## What reviewers say

### Proportion Solver

[App page](https://appshunter.io/ios/app/proportion-solver/id1532616220)

This app provides step-by-step solutions for mathematical proportions. It's designed for students and math enthusiasts to learn, practice, and simplify calculations with an intuitive interface and theoretical resources.

**Highlights:** Automatic proportion solving with steps, Theory cards for understanding, Advanced math keyboard, Intuitive interface, Integrated learning, Supports all proportion types

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

**In-app purchases:** none


### 世界の国名クイズ

[App page](https://appshunter.io/ios/app/id6797205214)

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

**In-app purchases:** none


## Frequently asked questions

### Is Proportion Solver free?

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

### Is 世界の国名クイズ free?

世界の国名クイズ is free to download, with no in-app purchases.

### Do Proportion Solver or 世界の国名クイズ have ads?

Both Proportion Solver and 世界の国名クイズ show ads.

### Which is updated more often, Proportion Solver or 世界の国名クイズ?

Proportion Solver ships an update every 6 weeks, and 世界の国名クイズ every 10 days. Most recently, Proportion Solver was updated on October 5, 2026 and 世界の国名クイズ on October 11, 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.*