# QControl vs HVAC Duct Flow

The clearest difference is iOS requirement: QControl at 12.0 against HVAC Duct Flow's 17.0. On price, update cadence, 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.

QControl ships an update weekly, HVAC Duct Flow every 5 days. The most recent releases landed on November 12, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | QControl | HVAC Duct Flow |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Weekly | **Every 5 days** |
| Size | 39 MB | 6 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Artur Shvaiberov](https://appshunter.io/developer/1551532949) | [Ahmet Selvi](https://appshunter.io/developer/1864624578) |

## What reviewers say

### QControl

[App page](https://appshunter.io/ios/app/qcontrol/id6740486218)

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

**In-app purchases:** none


### HVAC Duct Flow

[App page](https://appshunter.io/ios/app/hvac-duct-flow-duct-sizing/id6819098420)

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

**In-app purchases:** none


## Frequently asked questions

### Is QControl free?

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

### Is HVAC Duct Flow free?

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

### Do QControl or HVAC Duct Flow have ads?

Neither QControl nor HVAC Duct Flow shows ads.

### Which is updated more often, QControl or HVAC Duct Flow?

QControl ships an update weekly, and HVAC Duct Flow every 5 days. Most recently, QControl was updated on November 12, 2026 and HVAC Duct Flow on November 10, 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.*