# HVAC Pipe Sizer vs CoolCalc Scan

The clearest difference is review sentiment: HVAC Pipe Sizer at 80% against CoolCalc Scan's 0%. HVAC Pipe Sizer also leads on rating (5.0 vs 2.6). CoolCalc Scan's advantage is price (Free vs $7.99) and in-app purchases (none vs 1). On ads, device support and iOS requirement there is nothing between them.

CoolCalc Scan is free to download; HVAC Pipe Sizer costs $7.99 up front. HVAC Pipe Sizer sells 1 one-off in-app purchase. CoolCalc Scan asks for nothing beyond the download.

HVAC Pipe Sizer holds the better App Store score, 5.0 against 2.6. That said, the two scores are not equally well evidenced: CoolCalc Scan has 7 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 80% of HVAC Pipe Sizer's written reviews are positive against 0% of CoolCalc Scan's.

HVAC Pipe Sizer ships an update every 10 months, CoolCalc Scan monthly. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | HVAC Pipe Sizer | CoolCalc Scan |
| --- | --- | --- |
| Price | $7.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/hvac-pipe-sizer-gas-plus/id342239204/reviews)** | [2.6 (7 ratings)](https://appshunter.io/ios/app/coolcalc-scan/id6738354891/reviews) |
| Number of ratings | 1 | **7** |
| Positive reviews | **80.0% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 10 months | **Monthly** |
| Monetization | Paid | **Ad-supported** |
| Size | 1 MB | 12 MB |
| Requires iOS | **17.0** | 17.5 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Carmel Software Corporation](https://appshunter.io/developer/317970398) | [Cool Calc Inc.](https://appshunter.io/developer/1878735367) |

## What reviewers say

### HVAC Pipe Sizer

[App page](https://appshunter.io/ios/app/hvac-pipe-sizer-gas-plus/id342239204)

Calculate gas piping systems for low and high pressure. Input flow, pressure, or diameter to find pipe sizes, velocity, and equivalent lengths. Supports English and metric units, with extensive pipe fitting data.

**Highlights:** Low and high pressure gas pipe sizing, Calculate flow, pressure drop, diameter, and velocity, Universal app for iPhone and iPad, English and metric unit support, Built-in pipe fitting equivalent length tables, Slider controls for quick adjustments

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| HVAC Equipment Locator | $9.99 | one-time |


### 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 HVAC Pipe Sizer free?

HVAC Pipe Sizer costs $7.99, and also offers in-app purchases.

### Is CoolCalc Scan free?

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

### Which has better reviews, HVAC Pipe Sizer or CoolCalc Scan?

HVAC Pipe Sizer is rated higher. HVAC Pipe Sizer averages 5.0 out of 5 from 1 ratings, while CoolCalc Scan averages 2.6 from 7 ratings.

### Do HVAC Pipe Sizer or CoolCalc Scan have ads?

Neither HVAC Pipe Sizer nor CoolCalc Scan shows ads.

### Which is updated more often, HVAC Pipe Sizer or CoolCalc Scan?

HVAC Pipe Sizer ships an update every 10 months, and CoolCalc Scan monthly. Most recently, HVAC Pipe Sizer was updated on October 24, 2026 and CoolCalc Scan 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.*