# Caleffi Pipe Sizer vs Connexio

The clearest difference is iOS requirement: Caleffi Pipe Sizer at 13.0 against Connexio's 17.6. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Caleffi Pipe Sizer ships an update every 7 months, Connexio every 13 months. The most recent releases landed on June 25, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | Caleffi Pipe Sizer | Connexio |
| --- | --- | --- |
| Price | Free | Free |
| 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 13 months |
| Monetization | Free | — |
| Size | 44 MB | 27 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Caleffi S.p.A](https://appshunter.io/developer/920722440) | [Net Software](https://appshunter.io/developer/1450114814) |

## 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


### Connexio

[App page](https://appshunter.io/ios/app/connexio/id6475738054)

**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 Connexio free?

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

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

Neither Caleffi Pipe Sizer nor Connexio shows ads.

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

Caleffi Pipe Sizer ships an update every 7 months, and Connexio every 13 months. Most recently, Caleffi Pipe Sizer was updated on June 25, 2026 and Connexio on September 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.*