# TRAIN TECH コントローラー vs OTOTETSU

The clearest difference is review sentiment: OTOTETSU at 93% against TRAIN TECH コントローラー's 24%. OTOTETSU also leads on in-app purchases (none vs 10). TRAIN TECH コントローラー's advantage is update cadence (weekly vs every 2 months) and iOS requirement (7.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. TRAIN TECH コントローラー sells 10 one-off in-app purchases. OTOTETSU asks for nothing beyond the download.

TRAIN TECH コントローラー ships an update weekly, OTOTETSU every 2 months. The most recent releases landed on October 9, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | TRAIN TECH コントローラー | OTOTETSU |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (17 ratings)](https://appshunter.io/ios/app/ototetsu/id1557885726/reviews)** |
| Number of ratings | — | **17** |
| Positive reviews | 24.0% of reviews | **93.1% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 99 MB | 20 MB |
| Requires iOS | **7.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ZAIZEN Co., Ltd.](https://appshunter.io/developer/380406945) | [Hisato Takeuchi](https://appshunter.io/developer/1512764876) |

## What reviewers say

### TRAIN TECH コントローラー

[App page](https://appshunter.io/ios/app/train-tech/id1235359544)

Control your model trains wirelessly from your smartphone or tablet. Experience realistic operation and sounds, and switch between different train cockpits. Expand your collection with new train data and enjoy a detailed railway encyclopedia.

**Highlights:** Wireless train operation via smartphone/tablet, Realistic driving feel and sounds, Switchable cockpits for different train models, Expandable train data library, Control up to 8 tracks, Manage up to 20 points

**Features:** Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| トレインキッズ 電車タイプ | $0.99 | one-time |
| トレインキッズ 新幹線タイプ | $0.99 | one-time |
| 上田電鉄 1000系 | $1.99 | one-time |
| 上田電鉄 7200系（まるまどりーむ号） | $1.99 | one-time |
| JR東海 373系電車 | $1.99 | one-time |
| JR東海 383系電車 | $1.99 | one-time |
| JR東海 キハ85系気動車 | $1.99 | one-time |
| 国鉄 D51形蒸気機関車125号機 | $5.99 | one-time |
| 国鉄 EF64形電気機関車0番台 18号機 | $5.99 | one-time |
| ディーゼル機関車（寒冷地タイプB） | $5.99 | one-time |


### OTOTETSU

[App page](https://appshunter.io/ios/app/ototetsu/id1557885726)

This app simulates the characteristic sounds of electric trains, generated by inverters controlling motor torque and speed. Users can design sounds for imaginary trains by manipulating waveforms and motor sounds.

**Highlights:** Simulates electric train acceleration/deceleration sounds, Generates waveforms from inverters, Simulates motor sounds, Design imaginary train sounds, Customize torque and rotational speed effects

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

**In-app purchases:** none


## Frequently asked questions

### Is TRAIN TECH コントローラー free?

TRAIN TECH コントローラー is free to download, with in-app purchases available.

### Is OTOTETSU free?

OTOTETSU is free to download, with no in-app purchases.

### Do TRAIN TECH コントローラー or OTOTETSU have ads?

Neither TRAIN TECH コントローラー nor OTOTETSU shows ads.

### Which is updated more often, TRAIN TECH コントローラー or OTOTETSU?

TRAIN TECH コントローラー ships an update weekly, and OTOTETSU every 2 months. Most recently, TRAIN TECH コントローラー was updated on October 9, 2026 and OTOTETSU on October 4, 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.*