# Model Train Script vs Access Control by Shelly

The clearest difference is in-app purchases: Access Control by Shelly at none against Model Train Script's 2. Access Control by Shelly also leads on iOS requirement (15.0 vs 18.6). Model Train Script's advantage is update cadence (every 3 weeks vs every 2 months). On price, ads and device support there is nothing between them.

Both are free to download. Model Train Script sells 2 one-off in-app purchases. Access Control by Shelly asks for nothing beyond the download.

Model Train Script ships an update every 3 weeks, Access Control by Shelly every 2 months. The most recent releases landed on October 4, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Model Train Script | Access Control by Shelly |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Size | 46 MB | 10 MB |
| Requires iOS | 18.6 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Arjan Pragt](https://appshunter.io/developer/1654600131) | [SHELLY EUROPE EOOD](https://appshunter.io/developer/1521653049) |

## What reviewers say

### Model Train Script

[App page](https://appshunter.io/ios/app/model-train-script/id6444422153)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Donation for ModelTrainScript | $9.00 | one-time |
| License | $12.99 | one-time |


### Access Control by Shelly

[App page](https://appshunter.io/ios/app/access-control-by-shelly/id6474441948)

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

**In-app purchases:** none


## Frequently asked questions

### Is Model Train Script free?

Model Train Script is free to download, with in-app purchases available.

### Is Access Control by Shelly free?

Access Control by Shelly is free to download, with no in-app purchases.

### Do Model Train Script or Access Control by Shelly have ads?

Neither Model Train Script nor Access Control by Shelly shows ads.

### Which is updated more often, Model Train Script or Access Control by Shelly?

Model Train Script ships an update every 3 weeks, and Access Control by Shelly every 2 months. Most recently, Model Train Script was updated on October 4, 2026 and Access Control by Shelly on October 9, 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.*