# HyTools vs Caleffi Pipe Sizer

The clearest difference is rating: Caleffi Pipe Sizer at 5.0 against HyTools's 4.0. Caleffi Pipe Sizer also leads on iOS requirement (13.0 vs 15.0). HyTools's advantage is update cadence (every 6 weeks vs every 7 months) and ratings volume (5 vs 1). On price, review sentiment, 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 holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: HyTools has 5 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 50% and 50% positive.

HyTools ships an update every 6 weeks, Caleffi Pipe Sizer every 7 months. The most recent releases landed on September 28, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | HyTools | Caleffi Pipe Sizer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (5 ratings)](https://appshunter.io/ios/app/hytools/id537674477/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/caleffi-pipe-sizer/id1088928458/reviews)** |
| Number of ratings | **5** | 1 |
| Positive reviews | 50.0% of reviews | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 7 months |
| Monetization | Free | Free |
| Size | 114 MB | 44 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [IMI Hydronic Engineering International SA](https://appshunter.io/developer/508015425) | [Caleffi S.p.A](https://appshunter.io/developer/920722440) |

## What reviewers say

### HyTools

[App page](https://appshunter.io/ios/app/hytools/id537674477)

This app provides HVAC professionals with a comprehensive suite of hydronic calculation tools. It assists with tasks like valve sizing, pressure drop calculations, and radiator power estimation. The tool offers unit conversion and language selection for user convenience.

**Highlights:** Hydronic calculator, Valve sizing and presetting, Radiator power estimation, Pipe sizing, Unit conversion, Pressure maintenance calculation

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

**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 HyTools free?

HyTools 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, HyTools or Caleffi Pipe Sizer?

Caleffi Pipe Sizer is rated higher. HyTools averages 4.0 out of 5 from 5 ratings, while Caleffi Pipe Sizer averages 5.0 from 1 ratings.

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

Neither HyTools nor Caleffi Pipe Sizer shows ads.

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

HyTools ships an update every 6 weeks, and Caleffi Pipe Sizer every 7 months. Most recently, HyTools was updated on September 28, 2026 and Caleffi Pipe Sizer on October 2, 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.*