# 覚えよう百人一首 vs Math Grid Calculation Training

The clearest difference is in-app purchases: Math Grid Calculation Training at none against 覚えよう百人一首's 1. Math Grid Calculation Training also leads on update cadence (every 2 months vs every 4 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. 覚えよう百人一首 sells 1 one-off in-app purchase. Math Grid Calculation Training asks for nothing beyond the download.

覚えよう百人一首 ships an update every 4 months, Math Grid Calculation Training every 2 months. Both last shipped on September 12, 2026.

## The numbers

| Metric | 覚えよう百人一首 | Math Grid Calculation Training |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 4 months | **Every 2 months** |
| Size | 47 MB | 95 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Koji Murata](https://appshunter.io/developer/875202476) | [Masaki Kanno](https://appshunter.io/developer/843112443) |

## What reviewers say

### 覚えよう百人一首

[App page](https://appshunter.io/ios/app/id6761998472)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 広告の削除 | $1.99 | one-time |


### Math Grid Calculation Training

[App page](https://appshunter.io/ios/app/math-grid-calculation-training/id6769310340)

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

**In-app purchases:** none


## Frequently asked questions

### Is 覚えよう百人一首 free?

覚えよう百人一首 is free to download, with in-app purchases available.

### Is Math Grid Calculation Training free?

Math Grid Calculation Training is free to download, with no in-app purchases.

### Do 覚えよう百人一首 or Math Grid Calculation Training have ads?

Both 覚えよう百人一首 and Math Grid Calculation Training show ads.

### Which is updated more often, 覚えよう百人一首 or Math Grid Calculation Training?

覚えよう百人一首 ships an update every 4 months, and Math Grid Calculation Training every 2 months. Most recently, 覚えよう百人一首 was updated on September 12, 2026 and Math Grid Calculation Training on September 12, 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.*