# 150 GRS vs Smart Device Controller

The clearest difference is review sentiment: 150 GRS at 100% against Smart Device Controller's 27%. 150 GRS also leads on rating (5.0 vs 3.3) and iOS requirement (8.0 vs 10.3). 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.

150 GRS holds the better App Store score, 5.0 against 3.3. Both are backed by a comparable volume of ratings — 4 and 6 respectively. Written reviews point the same way: 100% of 150 GRS's written reviews are positive against 27% of Smart Device Controller's.

150 GRS ships an update every 2 months, Smart Device Controller every 3 months. The most recent releases landed on September 25, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | 150 GRS | Smart Device Controller |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/150-grs/id1164845927/reviews)** | [3.3 (6 ratings)](https://appshunter.io/ios/app/smart-device-controller/id1372692970/reviews) |
| Number of ratings | 4 | **6** |
| Positive reviews | **100.0% of reviews** | 27.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | Free | Free |
| Size | 28 MB | 26 MB |
| Requires iOS | **8.0** | 10.3 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Align Corporation Limited](https://appshunter.io/developer/485623955) | [SEKISUI KINZOKU CO., LTD](https://appshunter.io/developer/1343709801) |

## What reviewers say

### 150 GRS

[App page](https://appshunter.io/ios/app/150-grs/id1164845927)

This app utilizes advanced technology with high-precision sensors and innovative control routines to deliver a stable and feature-rich platform. It offers a highly reliable experience for users seeking advanced functionality.

**Highlights:** High precision sensors, Innovative control routines, Highly stable platform, Feature rich, High reliability

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is 150 GRS free?

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

### Is Smart Device Controller free?

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

### Which has better reviews, 150 GRS or Smart Device Controller?

150 GRS is rated higher. 150 GRS averages 5.0 out of 5 from 4 ratings, while Smart Device Controller averages 3.3 from 6 ratings.

### Do 150 GRS or Smart Device Controller have ads?

Neither 150 GRS nor Smart Device Controller shows ads.

### Which is updated more often, 150 GRS or Smart Device Controller?

150 GRS ships an update every 2 months, and Smart Device Controller every 3 months. Most recently, 150 GRS was updated on September 25, 2026 and Smart Device Controller 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.*