# Psychrometer °F vs Caleffi Pipe Sizer

The clearest difference is rating: Caleffi Pipe Sizer at 5.0 against Psychrometer °F's 4.5. Caleffi Pipe Sizer also leads on ads (none vs shown) and monetization model (free vs ad-supported). Psychrometer °F's advantage is ratings volume (133 vs 1) and review sentiment (67% vs 50%). On price, update cadence 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 4.5. That said, the two scores are not equally well evidenced: Psychrometer °F has 133 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 67% of Psychrometer °F's written reviews are positive against 50% of Caleffi Pipe Sizer's, so the app with the better star average is not the one people write more warmly about.

Psychrometer °F ships an update every 5 months, Caleffi Pipe Sizer every 7 months. The most recent releases landed on October 13, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Psychrometer °F | Caleffi Pipe Sizer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (133 ratings)](https://appshunter.io/ios/app/psychrometer-f/id650395794/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/caleffi-pipe-sizer/id1088928458/reviews)** |
| Number of ratings | **133** | 1 |
| Positive reviews | **66.7% of reviews** | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 5 months** | Every 7 months |
| Monetization | Ad-supported | **Free** |
| Size | 9 MB | 44 MB |
| Requires iOS | 18.6 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [JUN KANAYAMA](https://appshunter.io/developer/605648452) | [Caleffi S.p.A](https://appshunter.io/developer/920722440) |

## What reviewers say

### Psychrometer °F

[App page](https://appshunter.io/ios/app/psychrometer-f/id650395794)

This app calculates thermal comfort by evaluating heat, cold, dryness, and moisture. It provides detailed air property calculations and indicates if conditions are within a comfortable range, with easy dial input and color-coded temperature.

**Highlights:** Thermal comfort calculation, Air property analysis, Color-coded temperature, Dial input, Outdoor weather integration, Psychrometer type selection

**Features:** 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 Psychrometer °F free?

Psychrometer °F 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, Psychrometer °F or Caleffi Pipe Sizer?

Caleffi Pipe Sizer is rated higher. Psychrometer °F averages 4.5 out of 5 from 133 ratings, while Caleffi Pipe Sizer averages 5.0 from 1 ratings.

### Do Psychrometer °F or Caleffi Pipe Sizer have ads?

Psychrometer °F shows ads; Caleffi Pipe Sizer does not.

### Which is updated more often, Psychrometer °F or Caleffi Pipe Sizer?

Psychrometer °F ships an update every 5 months, and Caleffi Pipe Sizer every 7 months. Most recently, Psychrometer °F was updated on October 13, 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.*