# Air Flow Conversion Calculator vs Heights Telecom

The clearest difference is price: Heights Telecom at Free against Air Flow Conversion Calculator's $2.99. Heights Telecom also leads on update cadence (every 2 months vs every 47 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Heights Telecom is free to download; Air Flow Conversion Calculator costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Air Flow Conversion Calculator ships an update every 47 months, Heights Telecom every 2 months. The most recent releases landed on October 22, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Air Flow Conversion Calculator | Heights Telecom |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[3.5 (11 ratings)](https://appshunter.io/ios/app/air-flow-conversion-calculator/id1375810553/reviews)** | — |
| Number of ratings | **11** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 47 months | **Every 2 months** |
| Monetization | Paid | — |
| Size | 8 MB | 23 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nitrio](https://appshunter.io/developer/321121189) | [HEIGHTS TELECOM T LTD](https://appshunter.io/developer/1471852995) |

## What reviewers say

### Air Flow Conversion Calculator

[App page](https://appshunter.io/ios/app/air-flow-conversion-calculator/id1375810553)

Easily calculate air velocity and airflow volume for various duct types. Input dimensions and units, and get instant results for HVAC and ventilation applications.

**Highlights:** Calculate air velocity and airflow volume, Support for circular and rectangular ducts, Multiple unit options for velocity, volume, and dimensions, Instant result display, Useful for HVAC and ventilation

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

**In-app purchases:** none


### Heights Telecom

[App page](https://appshunter.io/ios/app/heights-telecom/id6664064878)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Air Flow Conversion Calculator free?

Air Flow Conversion Calculator costs $2.99, with no in-app purchases.

### Is Heights Telecom free?

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

### Do Air Flow Conversion Calculator or Heights Telecom have ads?

Neither Air Flow Conversion Calculator nor Heights Telecom shows ads.

### Which is updated more often, Air Flow Conversion Calculator or Heights Telecom?

Air Flow Conversion Calculator ships an update every 47 months, and Heights Telecom every 2 months. Most recently, Air Flow Conversion Calculator was updated on October 22, 2026 and Heights Telecom on October 16, 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.*