# Duct Sensor Assistant vs Air Flow Calculator

Duct Sensor Assistant and Air Flow Calculator are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

## The numbers

| Metric | Duct Sensor Assistant | Air Flow Calculator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | — |
| Size | 31 MB | 13 MB |
| Requires iOS | **12.0** | 12.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [BELIMO Automation AG](https://appshunter.io/developer/1149281298) | [Cornerstone Ltd](https://appshunter.io/developer/1710726250) |

## What reviewers say

### Duct Sensor Assistant

[App page](https://appshunter.io/ios/app/duct-sensor-assistant/id1559862597)

**Features:** macOS Compatibility

**In-app purchases:** none


### Air Flow Calculator

[App page](https://appshunter.io/ios/app/air-flow-calculator/id6468876568)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Duct Sensor Assistant free?

Duct Sensor Assistant is free to download, with no in-app purchases.

### Is Air Flow Calculator free?

Air Flow Calculator is free to download, with no in-app purchases.

### Do Duct Sensor Assistant or Air Flow Calculator have ads?

Neither Duct Sensor Assistant nor Air Flow Calculator shows ads.

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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.*