Electro Math vs 下水道3種対策
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Electro Math
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Includes a "timed" mode. A certain level of calculation speed is required to advance to the next stage, but many test-takers are satisfied with "just being able to solve" the problems and end up stagnating without being able to go "beyond that." Use this app to acquire the mathematical skills necessary for electrical engineering. Terms of Use（EULA）: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy https://sites.google.com/view/electro-math/denken-suugaku/privacy
下水道3種対策
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.
- 10,000+ practice questions
- 10 detailed chapters
- Chapter-specific practice
- Detailed explanations
- Progress tracking and statistics
- Offline functionality
- Dark/light theme support
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下水道第3種技術検定の対策アプリです。 ■ 10章×1000問の本格問題集 第1章 下水道総論と計画 第2章 管きょの構造と維持管理 第3章 下水処理の基礎 第4章 汚泥処理と処分 第5章 水質試験と水質管理 第6章 電気・機械設備 第7章 処理施設の運転管理 第8章 安全管理 第9章 下水道関連法規 第10章 総合問題と計算問題 ■ 主な機能 ・章別練習で苦手分野を集中対策 ・全問詳しい解説付き ・進捗管理と統計表示 ・ダーク・ライトテーマ対応 ・完全オフライン動作 本アプリは「下水道第3種技術検定」資格試験の予想問題集です。
Screenshots
Verdict
The clearest difference is in-app purchases: 下水道3種対策 at none against Electro Math's 1. Electro Math's advantage is update cadence (daily vs every 2 months) and iOS requirement (13.0 vs 15.1). On ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Electro Math ships an update daily, 下水道3種対策 every 2 months. Both last shipped on November 5, 2026.
| Parameter | Electro Math | 下水道3種対策 |
|---|---|---|
| Price | Free — better | — |
| Positive reviews | — | 100.0% of reviews |
| Update frequency | Daily — better | Every 2 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 44 MB | 36 MB |
| Age rating | 4+ | 4+ |
| Developer | ASUKA MINAMOTO | satoshi yoshida |
In-app purchases
Electro Math
- サブスクリプション（定期購読）7 Days trial$2.991 Month
下水道3種対策
No in-app purchases
