# SIAM Pro vs ABRTC

The clearest difference is update cadence: ABRTC at weekly against SIAM Pro's every 2 months. ABRTC also leads on iOS requirement (13.0 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, ABRTC weekly. The most recent releases landed on September 19, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | SIAM Pro | ABRTC |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Size | 81 MB | 22 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [SIAM INDUSTRIA DE AUTOMACAO E MONITORAMENTO LTDA.](https://appshunter.io/developer/1346976542) | [Code Centauri](https://appshunter.io/developer/1814866518) |

## What reviewers say

### SIAM Pro

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

**Features:** macOS Compatibility

**In-app purchases:** none


### ABRTC

[App page](https://appshunter.io/ios/app/abrtc/id6770614546)

**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 ABRTC free?

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

### Do SIAM Pro or ABRTC have ads?

Neither SIAM Pro nor ABRTC shows ads.

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

SIAM Pro ships an update every 2 months, and ABRTC weekly. Most recently, SIAM Pro was updated on September 19, 2026 and ABRTC on September 30, 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.*