# Air Flow Calculator vs ThreadChaser

The clearest difference is in-app purchases: Air Flow Calculator at none against ThreadChaser's 1. Air Flow Calculator also leads on iOS requirement (12.4 vs 18.6). On price, ads and device support there is nothing between them.

Both are free to download. ThreadChaser sells 1 in-app purchase, starting at $2.99 per year. Air Flow Calculator asks for nothing beyond the download.

## The numbers

| Metric | Air Flow Calculator | ThreadChaser |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 5 days |
| Size | 13 MB | 2 MB |
| Requires iOS | **12.4** | 18.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Cornerstone Ltd](https://appshunter.io/developer/1710726250) | [JAMIE SAM PARTOVI](https://appshunter.io/developer/1891387720) |

## What reviewers say

### Air Flow Calculator

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

**Features:** macOS Compatibility

**In-app purchases:** none


### ThreadChaser

[App page](https://appshunter.io/ios/app/threadchaser/id6761772249)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ThreadChaser Pro | $2.99 | per year |


## Frequently asked questions

### Is Air Flow Calculator free?

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

### Is ThreadChaser free?

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

### Do Air Flow Calculator or ThreadChaser have ads?

Neither Air Flow Calculator nor ThreadChaser 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.*