# CookTools vs Ductulator

The clearest difference is price: CookTools at Free against Ductulator's $3.99. CookTools also leads on iOS requirement (7.0 vs 18.6). Ductulator's advantage is update cadence (every 2 months vs every 7 months) and chart position (#53 vs unranked). On ads, in-app purchases and device support there is nothing between them.

CookTools is free to download; Ductulator costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

CookTools ships an update every 7 months, Ductulator every 2 months. The most recent releases landed on September 23, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | CookTools | Ductulator |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| Rating | — | **[4.7 (317 ratings)](https://appshunter.io/ios/app/ductulator-duct-sizing/id1474939475/reviews)** |
| Number of ratings | — | **317** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 2 months** |
| Monetization | — | Free |
| Best chart rank | — | **#53** |
| Size | 144 MB | 1 MB |
| Requires iOS | **7.0** | 18.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Loren Cook Company](https://appshunter.io/developer/376850738) | [Wassim Murr](https://appshunter.io/developer/1474939474) |

## What reviewers say

### CookTools

[App page](https://appshunter.io/ios/app/cooktools/id1103368817)

**Features:** macOS Compatibility

**In-app purchases:** none


### Ductulator

[App page](https://appshunter.io/ios/app/ductulator-duct-sizing/id1474939475)

**Currently charting:** #53 Top Paid · Productivity (US App Store)

Instantly calculate HVAC duct sizes based on airflow, friction rate, or velocity. This tool provides accurate duct dimensions in seconds without needing charts, supporting various duct types and units.

**Highlights:** Instant duct sizing, Friction rate or velocity calculation, Multiple valid duct dimensions, IP and SI units support, Detailed sizing mode, Rectangular, circular, and flexible ducts

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

**In-app purchases:** none


## Frequently asked questions

### Is CookTools free?

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

### Is Ductulator free?

Ductulator costs $3.99, with no in-app purchases.

### Do CookTools or Ductulator have ads?

Neither CookTools nor Ductulator shows ads.

### Which is updated more often, CookTools or Ductulator?

CookTools ships an update every 7 months, and Ductulator every 2 months. Most recently, CookTools was updated on September 23, 2026 and Ductulator on October 1, 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.*