# DuctCalc.Ca vs IBCconnect

The clearest difference is in-app purchases: IBCconnect at none against DuctCalc.Ca's 4. DuctCalc.Ca's advantage is review sentiment (50% vs 33%) and iOS requirement (11.3 vs 16.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. DuctCalc.Ca sells 4 one-off in-app purchases. IBCconnect asks for nothing beyond the download.

DuctCalc.Ca ships an update every 4 months, IBCconnect every 6 months. The most recent releases landed on October 1, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | DuctCalc.Ca | IBCconnect |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.9 (20 ratings)](https://appshunter.io/ios/app/ductcalcca/id1434460375/reviews)** | — |
| Number of ratings | **20** | — |
| Positive reviews | **50.0% of reviews** | 33.3% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 6 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 9 MB | 6 MB |
| Requires iOS | **11.3** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Firas Kneifati](https://appshunter.io/developer/1434460374) | [IBC Technologies Inc.](https://appshunter.io/developer/1480875726) |

## What reviewers say

### DuctCalc.Ca

[App page](https://appshunter.io/ios/app/ductcalcca/id1434460375)

This utility app calculates duct dimensions and air velocity using two methods: Equal Friction and Velocity. It supports both round and rectangular ducts, offering precise calculations for HVAC professionals. Offline functionality is available with a subscription.

**Highlights:** Duct sizing calculator, Equal Friction Method, Velocity Method, Round and rectangular duct support, Offline functionality, Full air flow range activation

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| One Month Full Air Flow | $6.99 | one-time |
| Three Months Full Air Flow | $17.99 | one-time |
| Six Months Full Air Flow | $29.99 | one-time |
| One Year Full Air Flow | $49.99 | one-time |


### IBCconnect

[App page](https://appshunter.io/ios/app/ibcconnect/id1480875727)

Control and monitor your IBC Air Handling Unit remotely. This application allows users to configure and manage their unit's operation directly from their iPhone or iPad.

**Highlights:** Connects to IBC Air Handling Units, Configure unit operation, Monitor unit status, Remote control via iPhone/iPad

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is DuctCalc.Ca free?

DuctCalc.Ca is free to download, with in-app purchases available.

### Is IBCconnect free?

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

### Do DuctCalc.Ca or IBCconnect have ads?

Neither DuctCalc.Ca nor IBCconnect shows ads.

### Which is updated more often, DuctCalc.Ca or IBCconnect?

DuctCalc.Ca ships an update every 4 months, and IBCconnect every 6 months. Most recently, DuctCalc.Ca was updated on October 1, 2026 and IBCconnect on October 3, 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.*