# Smart Device Controller vs OTOTETSU

The clearest difference is review sentiment: OTOTETSU at 93% against Smart Device Controller's 20%. OTOTETSU also leads on rating (4.7 vs 3.3). Smart Device Controller's advantage is iOS requirement (10.3 vs 15.0). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

OTOTETSU holds the better App Store score, 4.7 against 3.3. Both are backed by a comparable volume of ratings — 6 and 17 respectively. Written reviews point the same way: 20% of Smart Device Controller's written reviews are positive against 93% of OTOTETSU's.

Smart Device Controller ships an update every 3 months, OTOTETSU every 2 months. The most recent releases landed on June 2, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Smart Device Controller | OTOTETSU |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.3 (6 ratings)](https://appshunter.io/ios/app/smart-device-controller/id1372692970/reviews) | **[4.7 (17 ratings)](https://appshunter.io/ios/app/ototetsu/id1557885726/reviews)** |
| Number of ratings | 6 | **17** |
| Positive reviews | 20.0% of reviews | **93.1% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 26 MB | 20 MB |
| Requires iOS | **10.3** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SEKISUI KINZOKU CO., LTD](https://appshunter.io/developer/1343709801) | [Hisato Takeuchi](https://appshunter.io/developer/1512764876) |

## What reviewers say

### Smart Device Controller

[App page](https://appshunter.io/ios/app/smart-device-controller/id1372692970)

Transform your smartphone into a wireless remote for model trains. It offers compatibility with Soundbox, allowing for operation or use as a wireless power pack without the Soundbox. Control your model train setups with ease.

**Highlights:** Wireless model train operation, Soundbox compatibility, Use as wireless power pack, Smartphone remote control

**In-app purchases:** none


### 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 Smart Device Controller free?

Smart Device Controller is free to download, with no in-app purchases.

### Is OTOTETSU free?

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

### Which has better reviews, Smart Device Controller or OTOTETSU?

OTOTETSU is rated higher. Smart Device Controller averages 3.3 out of 5 from 6 ratings, while OTOTETSU averages 4.7 from 17 ratings.

### Do Smart Device Controller or OTOTETSU have ads?

Neither Smart Device Controller nor OTOTETSU shows ads.

### Which is updated more often, Smart Device Controller or OTOTETSU?

Smart Device Controller ships an update every 3 months, and OTOTETSU every 2 months. Most recently, Smart Device Controller was updated on June 2, 2026 and OTOTETSU on September 21, 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.*