# 1級ボイラー技士 vs エックス線作業主任者 一問一答 試験対策

1級ボイラー技士 and エックス線作業主任者 一問一答 試験対策 are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. 1級ボイラー技士 sells 1 one-off in-app purchase and エックス線作業主任者 一問一答 試験対策 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, エックス線作業主任者 一問一答 試験対策 every 4 days. The most recent releases landed on October 13, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | 1級ボイラー技士 | エックス線作業主任者 一問一答 試験対策 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 8 days | **Every 4 days** |
| Size | 5 MB | 9 MB |
| Requires iOS | 16.0 | 16.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [TAKAYUKI OOTA](https://appshunter.io/developer/1855196437) | [Particles and Waves](https://appshunter.io/developer/1812653811) |

## 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 |


### エックス線作業主任者 一問一答 試験対策

[App page](https://appshunter.io/ios/app/id6812901654)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro (Full Unlock) | $2.99 | 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 エックス線作業主任者 一問一答 試験対策 free?

エックス線作業主任者 一問一答 試験対策 is free to download, with in-app purchases available.

### Do 1級ボイラー技士 or エックス線作業主任者 一問一答 試験対策 have ads?

Neither 1級ボイラー技士 nor エックス線作業主任者 一問一答 試験対策 shows ads.

### Which is updated more often, 1級ボイラー技士 or エックス線作業主任者 一問一答 試験対策?

1級ボイラー技士 ships an update every 8 days, and エックス線作業主任者 一問一答 試験対策 every 4 days. Most recently, 1級ボイラー技士 was updated on October 13, 2026 and エックス線作業主任者 一問一答 試験対策 on October 9, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*