Comparison

HVAC Pipe Sizer vs CoolCalc Scan

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

HVAC Pipe Sizer

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
Read full description

The "HVAC Pipe Sizer - Gas Plus" application allows you to quickly size a simple low (less than or equal to 1.5 psi) and/or high (greater than 1.5 psi) pressure gas piping system by inputting a number of piping and gas properties. This application combines the functionality of our popular "HVAC Pipe Sizer - Gas Low" and "HVAC Pipe Sizer - Gas High" applications. This app is a universal app meaning that it works on both the iPhone and iPad and adjusts its screen size accordingly. For low pressure gas piping, you can specify the total gas flow in ft3/hr (m3/hr) and one of either pressure drop (in. wg or Pa), pipe internal diameter (inches) or gas velocity (ft/s) parameters. The results include both the exact and nominal pipe diameters and the calculated velocity and total pipe equivalent length. If you are analyzing an existing pipe system, there is an option to input the existing pipe internal diameter and one of either pressure drop or gas velocity parameters to derive the calculated gas flow and other remaining properties. For high pressure gas piping, you can specify the total gas flow in ft3/hr (m3/hr), the upstream pressure (psig or kPa), and one of either downstream pressure (psig or kPa), pipe internal diameter (inches) or gas velocity (ft/s) parameters. The results include both the exact and nominal pipe diameters and the calculated velocity and total pipe equivalent length. If you are analyzing an existing pipe system, there is an option to input the existing pipe internal diameter, the upstream pressure, and one of either downstream pressure or gas velocity parameters to derive the calculated gas flow and other remaining properties. You can specify additional parameters such as the type of gas, various properties of the gas, the pipe material type, the total length of pipe, quantities for up to 11 different types of pipe fittings, and much more. You can also choose to display values in either english or metric units. This application includes built-in pipe fitting equivalent length and nominal pipe sizing tables for a wide variety of pipe material types and diameters. This application uses slider controls that allow you to quickly increment or decrement the input values and immediately observe the calculated results. You can also manually input exact values. This app now includes the HVAC Equipment Locator. Click here for details: http://bit.ly/1yTq539 The "HVAC Pipe Sizer - Gas Plus" application was designed by Carmel Software Corporation, a leader in HVAC design software since 1995. In fact, Autodesk (the makers of AutoCAD) acquired our load calculation software and incorporated it into their leading 3D modeling software called Revit. In addition, we developed a number of customized apps for ASHRAE, DNV GL, and other organizations. We also offer the following additional apps for the iPhone and iPad: 1. HVAC Residential Load Calcs for iPhone and iPad 2. HVAC Quick Load Plus 3. HVAC Quick Load 4. HVAC Toolkit 5. HVAC Pipe Sizer – Gas Low Pressure 6. HVAC Pipe Sizer - Gas High Pressure 7. HVAC Pipe Sizer – Liquid 8. HVAC Pipe Sizer – Steam 9. Steam Tables 10. Psychrometric Plus 11. Psychrometric LT 12. HVAC Pipe Sizer Plus 13. HVAC Pipe Sizer Gas Plus 14. HVAC Toolkit Ultimate 15. HVAC Equipment Locator 16. HVAC ResLoad-J 17. HVAC Psych HD

About

CoolCalc Scan

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
Read full description

Free Scanning — Paid Web Features This iOS app is a companion to CoolCalc. Scanning is free. To use your scan results for ACCA Manual J, Manual S, or Manual D calculations, you’ll need a separate paid subscription or single-project purchase in app.coolcalc.com, our web app. KEY FEATURES • Precise LiDAR Scanning Capture detailed 3D models of rooms with accurate measurements. Document walls, ceilings, windows, doors, and room geometry with professional-grade precision. • Project Organization Create projects for different properties or jobs. Scan multiple rooms and keep everything organized in one place. • CoolCalc Platform Integration Connect your scans with the CoolCalc web platform. Upload your models for advanced processing and visualization with interactive 3D viewers. • Professional Export Export your 3D models in industry-standard formats. Share scans with clients, colleagues, or use them in other professional tools. • Multi-Room Scanning Document entire properties efficiently. Scan room by room and combine them into complete building models. IDEAL FOR Perfect for HVAC professionals, contractors, architects, interior designers, and anyone who needs accurate spatial measurements for their work. REQUIREMENTS • iPhone or iPad with LiDAR sensor (iPhone 12 Pro and later, iPad Pro 2020 and later) • iOS 17.5 or later • Account required for platform integration features

Screenshots

HVAC Pipe Sizer4 screens
CoolCalc Scan3 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

HVAC Pipe Sizer ships an update every 10 months, CoolCalc Scan monthly. Both last shipped on October 24, 2026.

Scorecard7 real differences · 3 level
HVAC Pipe Sizer versus CoolCalc Scan: the parameters behind the verdict, then further details
ParameterHVAC Pipe SizerCoolCalc Scan
Price$7.99Free — better
Rating5.0 (1 ratings) — better2.6 (7 ratings)
Positive reviews80.0% of reviews — better0.0% of reviews
Number of ratings17 — better
Update frequencyEvery 10 monthsMonthly — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationPaidAd-supported — better
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.0 — better17.5
Further details — not scored
Size1 MB12 MB
Age rating4+4+
DeveloperCarmel Software CorporationCool Calc, Inc.

Customer experience

HVAC Pipe Sizer

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews5 reviews
Positive80.0%
Neutral0.0%
Negative20.0%

CoolCalc Scan

All ratings7 ratings
Positive28.6%
Neutral14.3%
Negative57.1%
Written reviews2 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

1 purchases

HVAC Pipe Sizer

One-time1
  • HVAC Equipment Locator$9.99
None

CoolCalc Scan

No in-app purchases

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 24, 2026.

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