# Air Flow Conversion Calculator vs Megatuner Plus

The clearest difference is price: Megatuner Plus at Free against Air Flow Conversion Calculator's $2.99. Megatuner Plus also leads on update cadence (every 5 weeks vs every 47 months). Air Flow Conversion Calculator's advantage is in-app purchases (none vs 2) and iOS requirement (12.0 vs 16.0). On ads and device support there is nothing between them.

Megatuner Plus is free to download; Air Flow Conversion Calculator costs $2.99 up front. Megatuner Plus sells 2 in-app purchases, starting at $4.49 per month. Air Flow Conversion Calculator asks for nothing beyond the download.

Air Flow Conversion Calculator ships an update every 47 months, Megatuner Plus every 5 weeks. The most recent releases landed on October 5, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Air Flow Conversion Calculator | Megatuner Plus |
| --- | --- | --- |
| 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** | Yes |
| Ads | No | No |
| Update frequency | Every 47 months | **Every 5 weeks** |
| Monetization | Paid | — |
| Size | 8 MB | 1 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Nitrio](https://appshunter.io/developer/321121189) | [Christer Dalen](https://appshunter.io/developer/1655576002) |

## 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


### Megatuner Plus

[App page](https://appshunter.io/ios/app/megatuner-plus/id1665781784)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Megatuner_Mimo Full | $4.49 | per month |
| Megatuner_Mimo Full | $44.90 | per year |


## Frequently asked questions

### Is Air Flow Conversion Calculator free?

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

### Is Megatuner Plus free?

Megatuner Plus is free to download, with in-app purchases available.

### Do Air Flow Conversion Calculator or Megatuner Plus have ads?

Neither Air Flow Conversion Calculator nor Megatuner Plus shows ads.

### Which is updated more often, Air Flow Conversion Calculator or Megatuner Plus?

Air Flow Conversion Calculator ships an update every 47 months, and Megatuner Plus every 5 weeks. Most recently, Air Flow Conversion Calculator was updated on October 5, 2026 and Megatuner Plus on October 19, 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.*