# SIAM Pro vs GLSC

The clearest difference is update cadence: SIAM Pro at every 2 months against GLSC's every 11 months. GLSC's advantage is iOS requirement (11.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

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

SIAM Pro ships an update every 2 months, GLSC every 11 months. The most recent releases landed on September 19, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | SIAM Pro | GLSC |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 11 months |
| Size | 81 MB | 16 MB |
| Requires iOS | 15.6 | **11.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [SIAM INDUSTRIA DE AUTOMACAO E MONITORAMENTO LTDA.](https://appshunter.io/developer/1346976542) | [Nei Garcia](https://appshunter.io/developer/736701206) |

## What reviewers say

### SIAM Pro

[App page](https://appshunter.io/ios/app/siam-pro/id1560834841)

**Features:** macOS Compatibility

**In-app purchases:** none


### GLSC

[App page](https://appshunter.io/ios/app/glsc/id6450433903)

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

**In-app purchases:** none


## Frequently asked questions

### Is SIAM Pro free?

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

### Is GLSC free?

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

### Do SIAM Pro or GLSC have ads?

Neither SIAM Pro nor GLSC shows ads.

### Which is updated more often, SIAM Pro or GLSC?

SIAM Pro ships an update every 2 months, and GLSC every 11 months. Most recently, SIAM Pro was updated on September 19, 2026 and GLSC 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.*