# Tsunagu Denko: Electrician JP — Japan electrician exam study

> Japan electrician exam study (iPhone/iPad app by Sang Huynh.)

- Source: https://appshunter.io/ios/app/tsunagu-denko-electrician-jp/id6818807262 (this page in markdown: same URL + `.md`)
- Developer: [Sang Huynh](https://appshunter.io/developer/6816163922)
- Category: Education, Reference
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 26.0 · 83 MB
- Languages: English, Japanese
- Released: 2026-10-04
- Data updated: 2026-10-26

## What is Tsunagu Denko?

Study app for Japan's Second-Class Electrician exam (第二種電気工事士), in Japanese.

Written exam: 39 past papers (1,943 questions), each with its source and an explanation of every choice; zoomable wiring drawings; a CBT-style 50-question mock mode that resumes where you left off.
Practical exam: a wiring-plan trainer for all 13 candidate problems where you connect the wires yourself and the app checks colours, switching, ring sleeves and connectors.

Free: the 5 newest past papers, 3 wiring problems, the symbol table and a short weekly mock. Pro is a one-time purchase: no subscription, no ads. Progress stays on your device and in your own iCloud.

This app is independent and not affiliated with the exam body (Electrical Engineers Examination Center). Past questions are used under the body's published terms, with sources shown.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Tsunagu Denko Pro | $9.99 | one-time |


## Is Tsunagu Denko safe?

Not enough ratings yet to assess Tsunagu Denko.

## Is Tsunagu Denko legit?

Tsunagu Denko: Electrician JP appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Tsunagu Denko is 65 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 4 releases)

### 1.3 — 2026-10-25

Now supports the large display of iPhone Duo.
Minor improvements.

### 1.2 — 2026-10-12

Updated the app icon.

### 1.1 — 2026-10-09

Redesigned app: cleaner screens with fine rules, a clearer progress bar and easier-to-read type. Improved dark mode and large text support.

### 1.0 — 2026-10-05

No release notes.

## Apps similar to Tsunagu Denko

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [複線図トレーニング｜第二種電気工事士](https://appshunter.io/ios/app/id6814457233) | — | $4.99 | Education |
| [複線図トレーナー](https://appshunter.io/ios/app/id6806103051) | — | Free | Education |
| [第一種電気工事士 学科・技能サポート](https://appshunter.io/ios/app/id6785332995) | — | Free | Education |
| [第二種電気工事士 技能試験サポート](https://appshunter.io/ios/app/id6782425191) | — | Free | Education |
| [電気工事士２種 過去問（解説投稿型）第二種電気工事士](https://appshunter.io/ios/app/id6618139218) | — | Free | Education |
| [OORA](https://appshunter.io/ios/app/oora/id6756066878) | — | Free | Education |

## More apps by Sang Huynh

- [Hunker: Tornado Warning Alerts](https://appshunter.io/ios/app/hunker-tornado-warning-alerts/id6816467806)
- [RallyRound: Round Robin Maker](https://appshunter.io/ios/app/rallyround-round-robin-maker/id6816586509)
- [Inkroom: Tattoo Consent Forms](https://appshunter.io/ios/app/inkroom-tattoo-consent-forms/id6816634489)
- [Timepie: Visual Routine Timer](https://appshunter.io/ios/app/timepie-visual-routine-timer/id6816946874)
- [Clockwell: Hours Tracker & Pay](https://appshunter.io/ios/app/clockwell-hours-tracker-and-pay/id6817088641)
- [Headpin: Bowling Tracker](https://appshunter.io/ios/app/headpin-bowling-tracker/id6817464163)

All apps by Sang Huynh: https://appshunter.io/developer/6816163922

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-26.*