# Pipe Source vs Caleffi Pipe Sizer

The clearest difference is rating: Caleffi Pipe Sizer at 5.0 against Pipe Source's 4.0. Pipe Source's advantage is iOS requirement (7.1 vs 13.0). On price, ratings volume, update cadence and ads 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. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Pipe Source ships an update every 4 months, Caleffi Pipe Sizer every 7 months. Both last shipped on October 2, 2026.

## The numbers

| Metric | Pipe Source | Caleffi Pipe Sizer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (1 ratings)](https://appshunter.io/ios/app/pipe-source/id570134803/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/caleffi-pipe-sizer/id1088928458/reviews)** |
| Number of ratings | 1 | 1 |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 7 months |
| Monetization | Free | Free |
| Size | 12 MB | 44 MB |
| Requires iOS | **7.1** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Kelly Pipe Co. LLC](https://appshunter.io/developer/570134806) | [Caleffi S.p.A](https://appshunter.io/developer/920722440) |

## What reviewers say

### Pipe Source

[App page](https://appshunter.io/ios/app/pipe-source/id570134803)

Access comprehensive steel pipe specifications and industry conversion calculators. Easily find pipe charts for various sizes and schedules, and quickly convert units like feet to tons and $/ft to $/ton. Connect with industry experts for immediate assistance.

**Highlights:** Imperial and metric pipe charts, Wall thickness and weight per foot data, Oil Country and Tubular product information, Industry conversion calculators, Contact industry experts, Branch locator

**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 Pipe Source free?

Pipe Source 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, Pipe Source or Caleffi Pipe Sizer?

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

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

Neither Pipe Source nor Caleffi Pipe Sizer shows ads.

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

Pipe Source ships an update every 4 months, and Caleffi Pipe Sizer every 7 months. Most recently, Pipe Source was updated on October 2, 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.*