# Ductfolio: Duct Calculator — Duct sizing. Clear reports.

> Duct sizing. Clear reports. (iPhone/iPad app by Malkiel Shaul.)

- Source: https://appshunter.io/ios/app/ductfolio-duct-calculator/id6829281891 (this page in markdown: same URL + `.md`)
- Developer: [Malkiel Shaul](https://appshunter.io/developer/1253122402)
- Category: Productivity, Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 18.0 · 42 MB
- Languages: German (Germany), Arabic, American English, French (France), Hebrew, Dutch, Polish, Chinese (Traditional, Taiwan), Czech, Chinese (Simplified, China)
- Released: 2026-11-05
- Data updated: 2026-11-08

## What is Ductfolio?

Size and check rigid round or rectangular HVAC ducts with clear calculations, dimensions and assumptions.

Free calculations include one saved job, US and metric display units, and local backup. Pro unlocks comparisons, additional saved jobs, catalog editing, fit-to-space, pressure-loss assistance and PDF or CSV reports with one purchase. No subscription or account is required.

Calculations and jobs stay on your device. Use a backup to keep a separate copy. Buying or restoring Pro requires internet access.

Uses Darcy–Weisbach and Colebrook. Rectangular friction uses an equivalent round diameter; displayed velocity uses the actual area.

For rigid round and rectangular ducts. No flexible-duct model, thermal loads, network balancing or code certification. Apply professional judgment and verify project requirements.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Ductfolio Pro — Lifetime | $19.99 | one-time |


## Is Ductfolio safe?

Not enough ratings yet to assess Ductfolio.

## Is Ductfolio legit?

Ductfolio: Duct Calculator appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Ductfolio is 75 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 1 release)

### 1.0.0 — 2026-11-05

No release notes.

## More apps by Malkiel Shaul

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All apps by Malkiel Shaul: https://appshunter.io/developer/1253122402

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-11-08.*