# 下水道3種対策 vs 下水道技術検定3種Pass

The clearest difference is in-app purchases: 下水道3種対策 at none against 下水道技術検定3種Pass's 1. 下水道3種対策 also leads on ads (none vs shown). 下水道技術検定3種Pass's advantage is update cadence (every 2 weeks vs every 2 months). On device support and iOS requirement there is nothing between them.

下水道3種対策 ships an update every 2 months, 下水道技術検定3種Pass every 2 weeks. The most recent releases landed on September 23, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | 下水道3種対策 | 下水道技術検定3種Pass |
| --- | --- | --- |
| Price | — | **Free** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 36 MB | 40 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [satoshi yoshida](https://appshunter.io/developer/1873856165) | [KANDK](https://appshunter.io/developer/1867080143) |

## What reviewers say

### 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


### 下水道技術検定3種Pass

[App page](https://appshunter.io/ios/app/3pass/id6788900627)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $1.99 | one-time |


## Frequently asked questions

### 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.

### Is 下水道技術検定3種Pass free?

下水道技術検定3種Pass is free to download, with in-app purchases available.

### Do 下水道3種対策 or 下水道技術検定3種Pass have ads?

下水道技術検定3種Pass shows ads; 下水道3種対策 does not.

### Which is updated more often, 下水道3種対策 or 下水道技術検定3種Pass?

下水道3種対策 ships an update every 2 months, and 下水道技術検定3種Pass every 2 weeks. Most recently, 下水道3種対策 was updated on September 23, 2026 and 下水道技術検定3種Pass on September 29, 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.*