# HVAC vs EMCat

The clearest difference is update cadence: EMCat at every 2 months against HVAC's every 6 months. HVAC's advantage is iOS requirement (8.0 vs 12.0). 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.

HVAC ships an update every 6 months, EMCat every 2 months. The most recent releases landed on October 3, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | HVAC | EMCat |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 2 months** |
| Size | 12 MB | 66 MB |
| Requires iOS | **8.0** | 12.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [乔 黄](https://appshunter.io/developer/1499744042) | [秋 刘](https://appshunter.io/developer/1456085890) |

## What reviewers say

### HVAC

[App page](https://appshunter.io/ios/app/hvac-control/id1338034298)

**Features:** macOS Compatibility

**In-app purchases:** none


### EMCat

[App page](https://appshunter.io/ios/app/emcat/id6444023020)

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

**In-app purchases:** none


## Frequently asked questions

### Is HVAC free?

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

### Is EMCat free?

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

### Do HVAC or EMCat have ads?

Neither HVAC nor EMCat shows ads.

### Which is updated more often, HVAC or EMCat?

HVAC ships an update every 6 months, and EMCat every 2 months. Most recently, HVAC was updated on October 3, 2026 and EMCat on October 2, 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.*