# ChekDuct vs DuctCalc

The clearest difference is in-app purchases: ChekDuct at none against DuctCalc's 4. ChekDuct also leads on iOS requirement (15.1 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. DuctCalc sells 4 in-app purchases, starting at $0.99 per 7 days. ChekDuct asks for nothing beyond the download.

## The numbers

| Metric | ChekDuct | DuctCalc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 5 days |
| Size | 187 MB | 2 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Mohamed Kharbat](https://appshunter.io/developer/1894953065) | [Grima Hdez](https://appshunter.io/developer/1741481582) |

## What reviewers say

### ChekDuct

[App page](https://appshunter.io/ios/app/chekduct/id6768763588)

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

**In-app purchases:** none


### DuctCalc

[App page](https://appshunter.io/ios/app/ductcalc-hvac-ductulator/id6803406200)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DuctCalc Pro Weekly | $0.99 | per 7 days |
| DuctCalc Pro Monthly | $1.99 | per month |
| DuctCalc Pro Yearly | $2.99 | per year |
| DuctCalc Pro | $3.99 | one-time |


## Frequently asked questions

### Is ChekDuct free?

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

### Is DuctCalc free?

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

### Do ChekDuct or DuctCalc have ads?

Neither ChekDuct nor DuctCalc 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.*