# Psychrometer °F vs IHWAP Diagnostics

The clearest difference is in-app purchases: IHWAP Diagnostics at none against Psychrometer °F's 1. IHWAP Diagnostics also leads on ads (none vs shown) and review sentiment (100% vs 67%). Psychrometer °F's advantage is ratings volume (133 vs 5). On price, update cadence and device support there is nothing between them.

Both are free to download. Psychrometer °F sells 1 one-off in-app purchase. IHWAP Diagnostics asks for nothing beyond the download.

IHWAP Diagnostics 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 5, so its average is the more settled of the two. Written reviews point the same way: 67% of Psychrometer °F's written reviews are positive against 100% of IHWAP Diagnostics's.

Both ship on a similar rhythm, roughly every 5 months. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Psychrometer °F | IHWAP Diagnostics |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (133 ratings)](https://appshunter.io/ios/app/psychrometer-f/id650395794/reviews) | **[5.0 (5 ratings)](https://appshunter.io/ios/app/ihwap-diagnostics/id1618558493/reviews)** |
| Number of ratings | **133** | 5 |
| Positive reviews | 66.7% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 5 months | Every 5 months |
| Monetization | Ad-supported | **Free** |
| Size | 9 MB | 75 MB |
| Requires iOS | 18.6 | **16.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [JUN KANAYAMA](https://appshunter.io/developer/605648452) | [Travis Jenkins](https://appshunter.io/developer/1618558495) |

## 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 (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $3.99 | one-time |


### IHWAP Diagnostics

[App page](https://appshunter.io/ios/app/ihwap-diagnostics/id1618558493)

This application assists with home weatherization by quantifying air leakage, calculating ventilation needs, and assessing duct system pressure against program standards. It helps prioritize air sealing and ensures compliance with energy efficiency guidelines.

**Highlights:** Zone Pressure Diagnostics (ZPD), Total External Static Pressure (TESP) calculation, ASHRAE ventilation requirements, Leakage reduction potential estimation, ENERGY STAR compliance checks

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Psychrometer °F free?

Psychrometer °F is free to download, with in-app purchases available.

### Is IHWAP Diagnostics free?

IHWAP Diagnostics is free to download, with no in-app purchases.

### Which has better reviews, Psychrometer °F or IHWAP Diagnostics?

IHWAP Diagnostics is rated higher. Psychrometer °F averages 4.5 out of 5 from 133 ratings, while IHWAP Diagnostics averages 5.0 from 5 ratings.

### Do Psychrometer °F or IHWAP Diagnostics have ads?

Psychrometer °F shows ads; IHWAP Diagnostics does not.

### Which is updated more often, Psychrometer °F or IHWAP Diagnostics?

Psychrometer °F ships an update every 5 months, and IHWAP Diagnostics every 5 months. Most recently, Psychrometer °F was updated on November 6, 2026 and IHWAP Diagnostics on November 3, 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.*