# 電験三種 機械科目 秒トレ：第三種電気主任技術者 試験対策 vs 下水道3種対策

The clearest difference is in-app purchases: 下水道3種対策 at none against 電験三種 機械科目 秒トレ：第三種電気主任技術者 試験対策's 3. 下水道3種対策 also leads on review sentiment (100% vs 83%). On update cadence, ads, monetization model and device support there is nothing between them.

電験三種 機械科目 秒トレ：第三種電気主任技術者 試験対策 ships an update monthly, 下水道3種対策 every 2 months. The most recent releases landed on October 7, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | 電験三種 機械科目 秒トレ：第三種電気主任技術者 試験対策 | 下水道3種対策 |
| --- | --- | --- |
| Price | **Free** | — |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/id1639302836/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 83.3% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Monthly** | Every 2 months |
| Monetization | Free | Free |
| Size | 58 MB | 36 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [GINOAPPS LLC.](https://appshunter.io/developer/1482621114) | [satoshi yoshida](https://appshunter.io/developer/1873856165) |

## What reviewers say

### 電験三種 機械科目 秒トレ：第三種電気主任技術者 試験対策

[App page](https://appshunter.io/ios/app/id1639302836)

This app helps users efficiently study for the Grade 3 Electrical Engineer exam's mechanical subject. It features one-handed operation, optimized question settings, and a review function for difficult problems. Track your progress and estimate completion dates.

**Highlights:** One-handed operation for on-the-go study, Optimized question settings, Tap to search unfamiliar terms, Review difficult problems, Detailed progress tracking, Estimated completion date, Customizable text size and daily goals

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 電動機応用・電熱・照明・電気化学・自動制御・情報 | $2.99 | one-time |
| 回転機全般・変圧器・その他機器・パワーエレクトロニクス | $2.99 | one-time |
| 直流機・誘導機・同期機 | $2.99 | one-time |


### 下水道3種対策

[App page](https://appshunter.io/ios/app/3/id6768249358)

This app offers a comprehensive study guide for the 3rd Class Sewerage Technician certification exam. It features over 10,000 practice questions across 10 chapters, detailed explanations, and progress tracking. Study offline and customize your experience with dark/light themes.

**Highlights:** 10,000+ practice questions, 10 detailed chapters, Chapter-specific practice, Detailed explanations, Progress tracking and statistics, Offline functionality, Dark/light theme support

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

**In-app purchases:** none


## Frequently asked questions

### Is 電験三種 機械科目 秒トレ：第三種電気主任技術者 試験対策 free?

電験三種 機械科目 秒トレ：第三種電気主任技術者 試験対策 is free to download, with in-app purchases available.

### Is 下水道3種対策 free?

Pricing for 下水道3種対策 is not currently listed on the App Store.

### Do 電験三種 機械科目 秒トレ：第三種電気主任技術者 試験対策 or 下水道3種対策 have ads?

Neither 電験三種 機械科目 秒トレ：第三種電気主任技術者 試験対策 nor 下水道3種対策 shows ads.

### Which is updated more often, 電験三種 機械科目 秒トレ：第三種電気主任技術者 試験対策 or 下水道3種対策?

電験三種 機械科目 秒トレ：第三種電気主任技術者 試験対策 ships an update monthly, and 下水道3種対策 every 2 months. Most recently, 電験三種 機械科目 秒トレ：第三種電気主任技術者 試験対策 was updated on October 7, 2026 and 下水道3種対策 on October 9, 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.*