# Combi Valve Sizer vs Caleffi Pipe Sizer

The clearest difference is review sentiment: Caleffi Pipe Sizer at 50% against Combi Valve Sizer's 0%. Combi Valve Sizer's advantage is iOS requirement (7.0 vs 13.0). 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.

Combi Valve Sizer ships an update every 9 months, Caleffi Pipe Sizer every 7 months. The most recent releases landed on October 1, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Combi Valve Sizer | Caleffi Pipe Sizer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/caleffi-pipe-sizer/id1088928458/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 0.0% of reviews | **50.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 7 months** |
| Monetization | Free | Free |
| Size | 50 MB | 44 MB |
| Requires iOS | **7.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Siemens AG](https://appshunter.io/developer/394503271) | [Caleffi S.p.A](https://appshunter.io/developer/920722440) |

## What reviewers say

### Combi Valve Sizer

[App page](https://appshunter.io/ios/app/combi-valve-sizer/id504270106)

This app simplifies the selection of specific HVAC components. It guides users through choosing the correct valve and actuator, calculates flow rates, and assists with presetting and commissioning. Users can also tag components and download reports.

**Highlights:** Guided valve and actuator selection, Valve sizing and flow calculation, Valve presetting calculation, Tagging valve location and designation, Commissioning check with reports, Data sheet downloads, Report sharing

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Combi Valve Sizer free?

Combi Valve Sizer is free to download, with no in-app purchases.

### Is Caleffi Pipe Sizer free?

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

### Do Combi Valve Sizer or Caleffi Pipe Sizer have ads?

Neither Combi Valve Sizer nor Caleffi Pipe Sizer shows ads.

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

Combi Valve Sizer ships an update every 9 months, and Caleffi Pipe Sizer every 7 months. Most recently, Combi Valve Sizer was updated on October 1, 2026 and Caleffi Pipe Sizer on October 2, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*