# IHWAP Diagnostics vs CoolCalc Scan

The clearest difference is review sentiment: IHWAP Diagnostics at 100% against CoolCalc Scan's 0%. IHWAP Diagnostics also leads on rating (5.0 vs 2.6) and monetization model (free vs ad-supported). CoolCalc Scan's advantage is update cadence (every 4 weeks vs every 5 months). On price, ratings volume, 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.

IHWAP Diagnostics holds the better App Store score, 5.0 against 2.6. Both are backed by a comparable volume of ratings — 5 and 7 respectively. Written reviews point the same way: 100% of IHWAP Diagnostics's written reviews are positive against 0% of CoolCalc Scan's.

IHWAP Diagnostics ships an update every 5 months, CoolCalc Scan every 4 weeks. The most recent releases landed on September 26, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | IHWAP Diagnostics | CoolCalc Scan |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/ihwap-diagnostics/id1618558493/reviews)** | [2.6 (7 ratings)](https://appshunter.io/ios/app/coolcalc-scan/id6738354891/reviews) |
| Number of ratings | 5 | **7** |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 4 weeks** |
| Monetization | **Free** | Ad-supported |
| Size | 75 MB | 11 MB |
| Requires iOS | **16.0** | 17.5 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Travis Jenkins](https://appshunter.io/developer/1618558495) | [Cool Calc Inc.](https://appshunter.io/developer/1878735367) |

## What reviewers say

### 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


### CoolCalc Scan

[App page](https://appshunter.io/ios/app/coolcalc-scan/id6738354891)

Capture precise 3D room scans using your device's LiDAR sensor. Organize projects, integrate with a web platform for advanced visualization, and export models in industry-standard formats. Ideal for professionals needing accurate spatial data.

**Highlights:** Precise LiDAR scanning, Detailed 3D model capture, Project organization, CoolCalc platform integration, Industry-standard export formats, Multi-room scanning

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

**In-app purchases:** none


## Frequently asked questions

### Is IHWAP Diagnostics free?

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

### Is CoolCalc Scan free?

CoolCalc Scan is free to download, with no in-app purchases.

### Which has better reviews, IHWAP Diagnostics or CoolCalc Scan?

IHWAP Diagnostics is rated higher. IHWAP Diagnostics averages 5.0 out of 5 from 5 ratings, while CoolCalc Scan averages 2.6 from 7 ratings.

### Do IHWAP Diagnostics or CoolCalc Scan have ads?

Neither IHWAP Diagnostics nor CoolCalc Scan shows ads.

### Which is updated more often, IHWAP Diagnostics or CoolCalc Scan?

IHWAP Diagnostics ships an update every 5 months, and CoolCalc Scan every 4 weeks. Most recently, IHWAP Diagnostics was updated on September 26, 2026 and CoolCalc Scan on October 1, 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.*