# Ductulator vs CoolCalc Scan

The clearest difference is review sentiment: Ductulator at 50% against CoolCalc Scan's 0%. Ductulator also leads on rating (4.7 vs 2.6) and ratings volume (317 vs 7). CoolCalc Scan's advantage is price (Free vs $3.99) and update cadence (every 4 weeks vs every 2 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

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

Ductulator holds the better App Store score, 4.7 against 2.6. That said, the two scores are not equally well evidenced: Ductulator has 317 ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 50% of Ductulator's written reviews are positive against 0% of CoolCalc Scan's.

Ductulator ships an update every 2 months, CoolCalc Scan every 4 weeks. The most recent releases landed on October 15, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Ductulator | CoolCalc Scan |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | **[4.7 (317 ratings)](https://appshunter.io/ios/app/ductulator-duct-sizing/id1474939475/reviews)** | [2.6 (7 ratings)](https://appshunter.io/ios/app/coolcalc-scan/id6738354891/reviews) |
| Number of ratings | **317** | 7 |
| Positive reviews | **50.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 4 weeks** |
| Monetization | **Free** | Ad-supported |
| Best chart rank | **#113** | — |
| Size | 1 MB | 11 MB |
| Requires iOS | 18.6 | **17.5** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Wassim Murr](https://appshunter.io/developer/1474939474) | [Cool Calc Inc.](https://appshunter.io/developer/1878735367) |

## What reviewers say

### Ductulator

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

**Currently charting:** #113 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

**What reviewers like**

- 👍 Very helpful for duct sizing
- 👍 Easy to use in the field
- 👍 Saves time
- 👍 Seamless imperial/metric transitions
- 👍 Excellent tool for duct design

**What reviewers complain about**

- 👎 App should be free
- 👎 Functionality is pointless for some needs
- 👎 Doesn't help with traditional residential HVAC duct sizing
- 👎 App is a scam
- 👎 Decimal point doesn't work

**Reported bugs**

- Decimal point doesn't work on calculator
- New flex option isn't working properly
- Friction rate can't be changed in the latest version
- Skips duct sizes (e.g., 24-26)

**Requested features**

- Ability to pick duct size and see CFM
- Include flat oval ducts
- Option to select round or square duct
- Ability to enter duct size and get CFM
- Option for flex duct


### CoolCalc Scan

[App page](https://appshunter.io/ios/app/coolcalc-scan/id6738354891)

Capture precise 3D room scans using your device's LiDAR sensor. Organize projects, integrate with a web platform for advanced visualization, and export models in industry-standard formats. Ideal for professionals needing accurate spatial data.

**Highlights:** Precise LiDAR scanning, Detailed 3D model capture, Project organization, CoolCalc platform integration, Industry-standard export formats, Multi-room scanning

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

**In-app purchases:** none


## Frequently asked questions

### Is Ductulator free?

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

### Is CoolCalc Scan free?

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

### Which has better reviews, Ductulator or CoolCalc Scan?

Ductulator is rated higher. Ductulator averages 4.7 out of 5 from 317 ratings, while CoolCalc Scan averages 2.6 from 7 ratings.

### Do Ductulator or CoolCalc Scan have ads?

Neither Ductulator nor CoolCalc Scan shows ads.

### Which is updated more often, Ductulator or CoolCalc Scan?

Ductulator ships an update every 2 months, and CoolCalc Scan every 4 weeks. Most recently, Ductulator was updated on October 15, 2026 and CoolCalc Scan 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.*