# 1級ボイラー技士 vs 覚えよう百人一首

The clearest difference is ads: 1級ボイラー技士 at none against 覚えよう百人一首's shown. 1級ボイラー技士 also leads on update cadence (every 8 days vs every 4 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. 1級ボイラー技士 sells 1 one-off in-app purchase and 覚えよう百人一首 sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

1級ボイラー技士 ships an update every 8 days, 覚えよう百人一首 every 4 months. The most recent releases landed on October 28, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | 1級ボイラー技士 | 覚えよう百人一首 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 8 days** | Every 4 months |
| Size | 5 MB | 47 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [TAKAYUKI OOTA](https://appshunter.io/developer/1855196437) | [Koji Murata](https://appshunter.io/developer/875202476) |

## What reviewers say

### 1級ボイラー技士

[App page](https://appshunter.io/ios/app/1/id6757117093)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1級ボイラー技士 試験対策 | $1.99 | one-time |


### 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 |


## Frequently asked questions

### Is 1級ボイラー技士 free?

1級ボイラー技士 is free to download, with in-app purchases available.

### 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.

### Do 1級ボイラー技士 or 覚えよう百人一首 have ads?

覚えよう百人一首 shows ads; 1級ボイラー技士 does not.

### Which is updated more often, 1級ボイラー技士 or 覚えよう百人一首?

1級ボイラー技士 ships an update every 8 days, and 覚えよう百人一首 every 4 months. Most recently, 1級ボイラー技士 was updated on October 28, 2026 and 覚えよう百人一首 on October 24, 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.*