Comparison

HVAC Pipe Sizer vs Offset Calc App ANSI

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 now 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

Offset Calc App ANSI

This industrial pipe construction tool calculates pipe offsets and weights according to ANSI/ASME standards. It offers imperial and metric calculations for various pipe sizes and fittings, helping users save material, time, and stress.

Highlights
  • Imperial and metric offset calculations
  • Pipe and profile weight calculations
  • ANSI/ASME standard nominal diameters
  • Calculation with length or elbow angle
  • Offsets with tee
  • History of calculations
Features
Read full description

The app is used in the industrial pipe construction. (American Standard ASME B36.10/ B16.9) Functions: Calculation (imperial and metric) of offsets and weight calculation of pipes, offsets and profiles. All nominal diameter and fittings are provided, so it will be very easy for you to solve complex calculations quickly. Even if you put in false information, you can not get wrong solutions. This way you can save material, time and stress. The App is your help in a hectic and busy working day. - 28 offset calculations (8 offset types with 2 or 4 interrupts) - Given nominal diameters (NPS 1-40/DN 25-1000) according to ANSI/ASME with outside diameter (exemple NPS 5/DN 100- 4.5in/114,3mm), - Calculation with lenght or elbow angle - 2 types of elbow - Manual input of elbow radius - Offsets with tee - Individual gap - Detailed help and description - History of your calculations Results - Cut length - Elbow angle - Inside and outside cutting values of the elbow - Take off, chord - Installation length of offset - Calculation of offset weight Weight calculation of - Pipes, - 2 types of elbow - Channels (C3-C10) - H Beams (W4-W10), - Manual inputs. Single weights will be added to the list, so that you can use the weight of the construction units to choose the right lifting gear.

Screenshots

HVAC Pipe Sizer4 screens
Offset Calc App ANSI4 screens

Verdict

The call

The clearest difference is in-app purchases: Offset Calc App ANSI at none against HVAC Pipe Sizer's 1. Offset Calc App ANSI also leads on update cadence (monthly vs every 12 months) and review sentiment (100% vs 80%). On rating, ads, monetization model and device support 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

HVAC Pipe Sizer costs $7.99 and Offset Calc App ANSI $6.99 up front. HVAC Pipe Sizer sells 1 one-off in-app purchase. Offset Calc App ANSI asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for HVAC Pipe Sizer against 5.0 for Offset Calc App ANSI. That said, the two scores are not equally well evidenced: Offset Calc App ANSI has 19 ratings behind it against 1, so its average is the more settled of the two. Written reviews are what separate them: 80% of HVAC Pipe Sizer's written reviews are positive against 100% of Offset Calc App ANSI's.

UpkeepUpdate frequency

HVAC Pipe Sizer ships an update every 12 months, Offset Calc App ANSI monthly. The most recent releases landed on September 9, 2026 and September 21, 2026 respectively.

Scorecard7 real differences · 4 level
HVAC Pipe Sizer versus Offset Calc App ANSI: the parameters behind the verdict, then further details
ParameterHVAC Pipe SizerOffset Calc App ANSI
Price$7.99$6.99 — better
Rating5.0 (1 ratings)5.0 (19 ratings)
Positive reviews80.0% of reviews100.0% of reviews — better
Number of ratings119 — better
Update frequencyEvery 12 monthsMonthly — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationPaidPaid
Best chart rank—#200 — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.610.0 — better
Further details — not scored
Size18 MB95 MB
Age rating4+4+
DeveloperCarmel Software CorporationSteffen Weber

Customer experience

HVAC Pipe Sizer

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

Offset Calc App ANSI

All ratings19 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

HVAC Pipe Sizer

One-time1
  • HVAC Equipment Locator$9.99
None

Offset Calc App ANSI

No in-app purchases

Questions

Is HVAC Pipe Sizer free?
HVAC Pipe Sizer costs $7.99, and also offers in-app purchases.
Is Offset Calc App ANSI free?
Offset Calc App ANSI costs $6.99, with no in-app purchases.
Which has better reviews, HVAC Pipe Sizer or Offset Calc App ANSI?
HVAC Pipe Sizer and Offset Calc App ANSI are both rated 5.0 out of 5 on the App Store, from 1 and 19 ratings respectively.
Do HVAC Pipe Sizer or Offset Calc App ANSI have ads?
Neither HVAC Pipe Sizer nor Offset Calc App ANSI shows ads.
Which is updated more often, HVAC Pipe Sizer or Offset Calc App ANSI?
HVAC Pipe Sizer ships an update every 12 months, and Offset Calc App ANSI monthly. Most recently, HVAC Pipe Sizer was updated on September 9, 2026 and Offset Calc App ANSI on September 21, 2026.

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