# Ductulator vs CxPlanner

The clearest difference is price: CxPlanner at Free against Ductulator's $3.99. CxPlanner also leads on iOS requirement (13.0 vs 18.6). Ductulator's advantage is update cadence (every 2 months vs every 28 months) and chart position (#39 vs unranked). On ads, in-app purchases and device support there is nothing between them.

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

Ductulator ships an update every 2 months, CxPlanner every 28 months. The most recent releases landed on September 22, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Ductulator | CxPlanner |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| 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 2 months** | Every 28 months |
| Monetization | Free | — |
| Best chart rank | **#39** | — |
| Size | 1 MB | 1 MB |
| Requires iOS | 18.6 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Wassim Murr](https://appshunter.io/developer/1474939474) | [Commissioning ApS](https://appshunter.io/developer/1564572062) |

## What reviewers say

### Ductulator

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

**Currently charting:** #39 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


### CxPlanner

[App page](https://appshunter.io/ios/app/cxplanner/id1564572060)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Ductulator free?

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

### Is CxPlanner free?

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

### Do Ductulator or CxPlanner have ads?

Neither Ductulator nor CxPlanner shows ads.

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

Ductulator ships an update every 2 months, and CxPlanner every 28 months. Most recently, Ductulator was updated on September 22, 2026 and CxPlanner on September 8, 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.*