# ClimateMaster Skyport vs Ductulator

ClimateMaster Skyport and Ductulator both sit at 4.6 stars, but that hides the real split: 100% of ClimateMaster Skyport's written reviews are positive against 50% of Ductulator's. ClimateMaster Skyport also leads on price (Free vs $3.99) and iOS requirement (15.6 vs 18.6). Ductulator's advantage is update cadence (every 2 months vs every 8 months) and ratings volume (362 vs 31). On rating, ads, in-app purchases and monetization model there is nothing between them.

ClimateMaster Skyport 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 4.6. That said, the two scores are not equally well evidenced: Ductulator has 362 ratings behind it against 31, so its average is the more settled of the two. Written reviews complicate that: 100% of ClimateMaster Skyport's written reviews are positive against 50% of Ductulator's, so the app with the better star average is not the one people write more warmly about.

ClimateMaster Skyport ships an update every 8 months, Ductulator every 2 months. The most recent releases landed on November 3, 2026 and November 11, 2026 respectively.

## The numbers

| Metric | ClimateMaster Skyport | Ductulator |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| Rating | [4.6 (31 ratings)](https://appshunter.io/ios/app/climatemaster-skyport/id1473149708/reviews) | **[4.7 (362 ratings)](https://appshunter.io/ios/app/ductulator-duct-sizing/id1474939475/reviews)** |
| Number of ratings | 31 | **362** |
| Positive reviews | **100.0% of reviews** | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 2 months** |
| Monetization | Free | Free |
| Best chart rank | — | **#65** |
| Size | 65 MB | 1 MB |
| Requires iOS | **15.6** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Skyport Labs, LLC](https://appshunter.io/developer/1234749952) | [Wassim Murr](https://appshunter.io/developer/1474939474) |

## What reviewers say

### ClimateMaster Skyport

[App page](https://appshunter.io/ios/app/climatemaster-skyport/id1473149708)

Remotely monitor and control your home's heating and cooling system from your iPhone, iPad, or iPod Touch. View current weather, forecasts, and equipment runtimes, and receive important alerts for ultimate comfort and peace of mind.

**Highlights:** Remote thermostat monitoring and control, Current weather and forecast display, Equipment runtime monitoring, Thermostat alert notifications, Home/Away status selection

**In-app purchases:** none


### Ductulator

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

**Currently charting:** #65 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


## Frequently asked questions

### Is ClimateMaster Skyport free?

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

### Is Ductulator free?

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

### Which has better reviews, ClimateMaster Skyport or Ductulator?

Ductulator is rated higher. ClimateMaster Skyport averages 4.6 out of 5 from 31 ratings, while Ductulator averages 4.7 from 362 ratings.

### Do ClimateMaster Skyport or Ductulator have ads?

Neither ClimateMaster Skyport nor Ductulator shows ads.

### Which is updated more often, ClimateMaster Skyport or Ductulator?

ClimateMaster Skyport ships an update every 8 months, and Ductulator every 2 months. Most recently, ClimateMaster Skyport was updated on November 3, 2026 and Ductulator on November 11, 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.*