# DuctChecker vs DUCTable

The clearest difference is price: DUCTable at Free against DuctChecker's $6.99. DUCTable also leads on update cadence (every 3 weeks vs every 4 months) and iOS requirement (13.0 vs 15.0). On ads, in-app purchases and device support there is nothing between them.

DUCTable is free to download; DuctChecker costs $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.

DuctChecker ships an update every 4 months, DUCTable every 3 weeks. The most recent releases landed on September 7, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | DuctChecker | DUCTable |
| --- | --- | --- |
| Price | $6.99 | **Free** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Monetization | Paid | — |
| Size | 23 MB | 9 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [AIR DESIGN, INC.](https://appshunter.io/developer/923430781) | [SHIN NIPPON AIR TECHNOLOGIES CO.,LTD.](https://appshunter.io/developer/1526286874) |

## What reviewers say

### DuctChecker

[App page](https://appshunter.io/ios/app/ductchecker/id933593987)

Easily calculate duct dimensions using various engineering methods like constant pressure, static pressure regain, total pressure, and velocity. This tool simplifies complex duct design calculations, typically found in flow diagrams or slide rules.

**Highlights:** Constant pressure method calculation, Static pressure regain method, Total pressure method, Velocity method, Duct dimension determination, Simplified duct design

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

**In-app purchases:** none


### DUCTable

[App page](https://appshunter.io/ios/app/ductable/id1526286872)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is DuctChecker free?

DuctChecker costs $6.99, with no in-app purchases.

### Is DUCTable free?

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

### Do DuctChecker or DUCTable have ads?

Neither DuctChecker nor DUCTable shows ads.

### Which is updated more often, DuctChecker or DUCTable?

DuctChecker ships an update every 4 months, and DUCTable every 3 weeks. Most recently, DuctChecker was updated on September 7, 2026 and DUCTable on September 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.*