# Caleffi Pipe Sizer vs FirmaDoc

The clearest difference is price: Caleffi Pipe Sizer at Free against FirmaDoc's $0.99. Caleffi Pipe Sizer also leads on iOS requirement (13.0 vs 17.0). FirmaDoc's advantage is update cadence (every 2 days vs every 7 months). On ads, in-app purchases and device support there is nothing between them.

Caleffi Pipe Sizer is free to download; FirmaDoc costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Caleffi Pipe Sizer ships an update every 7 months, FirmaDoc every 2 days. The most recent releases landed on October 2, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Caleffi Pipe Sizer | FirmaDoc |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/caleffi-pipe-sizer/id1088928458/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 2 days** |
| Monetization | Free | — |
| Size | 44 MB | 2 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Caleffi S.p.A](https://appshunter.io/developer/920722440) | [Domenico Pace](https://appshunter.io/developer/6785939748) |

## What reviewers say

### Caleffi Pipe Sizer

[App page](https://appshunter.io/ios/app/caleffi-pipe-sizer/id1088928458)

This application assists hydraulic and HVAC professionals in accurately sizing water or air pipes. It calculates pressure drops and offers a modern, intuitive interface for precise system design on the go.

**Highlights:** Accurate water/air pipe sizing, Pressure drop calculation, Customizable technical parameter calculations, Extensive material and configuration library, Modern and intuitive interface, Enhanced performance

**Features:** macOS Compatibility

**In-app purchases:** none


### FirmaDoc

[App page](https://appshunter.io/ios/app/firmadoc/id6797868993)

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

**In-app purchases:** none


## Frequently asked questions

### Is Caleffi Pipe Sizer free?

Caleffi Pipe Sizer is free to download, with no in-app purchases.

### Is FirmaDoc free?

FirmaDoc costs $0.99, with no in-app purchases.

### Do Caleffi Pipe Sizer or FirmaDoc have ads?

Neither Caleffi Pipe Sizer nor FirmaDoc shows ads.

### Which is updated more often, Caleffi Pipe Sizer or FirmaDoc?

Caleffi Pipe Sizer ships an update every 7 months, and FirmaDoc every 2 days. Most recently, Caleffi Pipe Sizer was updated on October 2, 2026 and FirmaDoc on October 10, 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.*