# Amtrol vs Caleffi Pipe Sizer

Amtrol and Caleffi Pipe Sizer both sit at 5.0 stars, but that hides the real split: 100% of Amtrol's written reviews are positive against 50% of Caleffi Pipe Sizer's. Amtrol also leads on iOS requirement (9.0 vs 13.0). On price, rating, ratings volume and update cadence there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for Amtrol against 5.0 for Caleffi Pipe Sizer. Both are backed by a comparable volume of ratings — 1 and 1 respectively. Written reviews are what separate them: 100% of Amtrol's written reviews are positive against 50% of Caleffi Pipe Sizer's.

Amtrol ships an update every 8 months, Caleffi Pipe Sizer every 7 months. Both last shipped on November 13, 2026.

## The numbers

| Metric | Amtrol | Caleffi Pipe Sizer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/amtrol/id506006873/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/caleffi-pipe-sizer/id1088928458/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | **100.0% of reviews** | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 7 months** |
| Monetization | Free | Free |
| Size | 7 MB | 44 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Amtrol, Inc.](https://appshunter.io/developer/506006876) | [Caleffi S.p.A](https://appshunter.io/developer/920722440) |

## What reviewers say

### Amtrol

[App page](https://appshunter.io/ios/app/amtrol/id506006873)

This app provides product sizing, selection, and application support for plumbing, heating, and water systems. Access literature, videos, price books, and technical support for various product lines. It also offers mobile access to the Amtrol Rewards installer points program.

**Highlights:** Product sizing and selection, Application support, Literature and videos, Price book access, Technical support, Rewards installer points program

**Features:** macOS Compatibility

**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 Amtrol free?

Amtrol 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.

### Which has better reviews, Amtrol or Caleffi Pipe Sizer?

Amtrol and Caleffi Pipe Sizer are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

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

Neither Amtrol nor Caleffi Pipe Sizer shows ads.

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

Amtrol ships an update every 8 months, and Caleffi Pipe Sizer every 7 months. Most recently, Amtrol was updated on November 13, 2026 and Caleffi Pipe Sizer on November 13, 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.*