# Caleffi Pipe Sizer vs Energy Auditor Mobile

The clearest difference is in-app purchases: Caleffi Pipe Sizer at none against Energy Auditor Mobile's 1. Caleffi Pipe Sizer also leads on iOS requirement (13.0 vs 15.1). Energy Auditor Mobile's advantage is update cadence (daily vs every 7 months). On price, ads and device support there is nothing between them.

Both are free to download. Energy Auditor Mobile sells 1 in-app purchase, starting at $5.99 per month. Caleffi Pipe Sizer asks for nothing beyond the download.

Caleffi Pipe Sizer ships an update every 7 months, Energy Auditor Mobile daily. The most recent releases landed on November 2, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Caleffi Pipe Sizer | Energy Auditor Mobile |
| --- | --- | --- |
| 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** | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Daily** |
| Monetization | Free | — |
| Size | 44 MB | 32 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Caleffi S.p.A](https://appshunter.io/developer/920722440) | [Kirk May](https://appshunter.io/developer/1834381707) |

## 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


### Energy Auditor Mobile

[App page](https://appshunter.io/ios/app/energy-auditor-mobile/id6751273080)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Energy Auditor App Monthly | $5.99 | per month |


## Frequently asked questions

### Is Caleffi Pipe Sizer free?

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

### Is Energy Auditor Mobile free?

Energy Auditor Mobile is free to download, with in-app purchases available.

### Do Caleffi Pipe Sizer or Energy Auditor Mobile have ads?

Neither Caleffi Pipe Sizer nor Energy Auditor Mobile shows ads.

### Which is updated more often, Caleffi Pipe Sizer or Energy Auditor Mobile?

Caleffi Pipe Sizer ships an update every 7 months, and Energy Auditor Mobile daily. Most recently, Caleffi Pipe Sizer was updated on November 2, 2026 and Energy Auditor Mobile on October 25, 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.*