# SILCA vs Alpha HVAC

The clearest difference is update cadence: Alpha HVAC at every 11 days against SILCA's every 2 months. SILCA's advantage is device support (3 vs 1) and iOS requirement (14.0 vs 16.4). On price, ads and in-app purchases there is nothing between them.

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

SILCA ships an update every 2 months, Alpha HVAC every 11 days. The most recent releases landed on November 3, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | SILCA | Alpha HVAC |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (35 ratings)](https://appshunter.io/ios/app/silca/id1637948645/reviews)** | — |
| Number of ratings | **35** | — |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 11 days** |
| Monetization | Free | — |
| Size | 16 MB | 50 MB |
| Requires iOS | **14.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Aeromind LLC](https://appshunter.io/developer/1637948647) | [Alpha Wholesale HVAC LTD](https://appshunter.io/developer/1896330381) |

## What reviewers say

### SILCA

[App page](https://appshunter.io/ios/app/silca/id1637948645)

This app showcases a legacy of innovation in cycling accessories, tracing its roots back to 1917. It highlights pioneering advancements like integrated pump gauges and valve-controlled CO2 inflators, alongside modern uses of 3D printing in titanium.

**Highlights:** Pump gauge innovation, High-pressure frame pumps, Valve-controlled CO2 inflators, 3D printing in titanium, Legacy of cycling innovation

**Features:** macOS Compatibility

**In-app purchases:** none


### Alpha HVAC

[App page](https://appshunter.io/ios/app/alpha-hvac/id6791237546)

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

**In-app purchases:** none


## Frequently asked questions

### Is SILCA free?

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

### Is Alpha HVAC free?

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

### Do SILCA or Alpha HVAC have ads?

Neither SILCA nor Alpha HVAC shows ads.

### Which is updated more often, SILCA or Alpha HVAC?

SILCA ships an update every 2 months, and Alpha HVAC every 11 days. Most recently, SILCA was updated on November 3, 2026 and Alpha HVAC on October 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.*