Comparison

HVAC Pipe Sizer vs HOBOconnect

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

This utility app helps engineers quickly size high-pressure gas piping systems. Input flow, pressure, and pipe properties to calculate diameters, velocity, and equivalent length. Supports English and metric units with built-in tables for various pipe materials.

Highlights
  • High-pressure gas pipe sizing
  • Input flow, pressure, and pipe parameters
  • Calculate exact/nominal diameters
  • Determine velocity and equivalent length
  • Supports English and metric units
  • Includes pipe fitting tables
  • Universal app for iPhone and iPad
Features
Read full description

The "HVAC Pipe Sizer - Gas High" application allows you to quickly size a simple high pressure (> 1.5psi) gas piping system by inputting a number of piping and gas properties. This is now a universal app that works on both the iPhone and iPad and sizes the screen size accordingly. You can specify the total gas flow in ft^3/hr (m^3/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 downtream 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 This 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. We also offer the following additional applications for the iPhone/iPad: 1. HVAC Duct Sizer 2. HVAC Pipe Sizer – Gas Low Pressure 3. HVAC Pipe Sizer - Gas High Pressure 4. HVAC Pipe Sizer – Liquid 5. HVAC Pipe Sizer – Steam 6. Steam Tables 7. Psychrometric Plus 8. Psychrometric LT 9. HVAC Pipe Sizer Plus 10. HVAC Pipe Sizer Gas Plus 11. HVAC Toolkit 12. HVAC Toolkit Ultimate 13. HVAC Residential Load Calcs 14. HVAC Load Plus 15. HVAC Equipment Locator 16. ASHRAE Duct Fitting Database 17. ASHRAE 62.1 Ventilation Load Calcs 18. HVAC Psych HD 19. HVAC ResLoad-J 20. HVAC Residential Load Calcs HD

About

HOBOconnect

Wirelessly configure, start, and download data from HOBO MX data loggers via Bluetooth. View, analyze, and export recorded data in various formats for further use in other applications.

Highlights
  • Wireless Bluetooth communication with HOBO MX loggers
  • Configure logger settings (name, password, rate, alarms)
  • Monitor logger status (memory, battery)
  • Download and view recorded data
  • Data analysis in graphical and list formats
  • Export data as CSV, TXT, XLSX, and HOBO files
Features
Read full description

HOBOconnect is designed to communicate wirelessly via Bluetooth Low Energy to the HOBO® MX data loggers. You can configure and start the data logger, download the recorded data, store and analyze the data. The data can be viewed in both graphical and list formats and also exported and shared to other programs including Numbers, Excel and HOBOware®. Features: * Wirelessly communicate to the HOBO® MX data loggers * Internet connection not required to use HOBOconnect * Set data logger's name, password, logging rate, alarm threshold, start & stop time * Check logger’s status included memory used and battery life * Clear audible alarms (for models with this feature) * Page the data logger * Manage data files with groups * Download and view data * Zoom in and out of the graph with gestures * Export and Share data as a CSV, TXT, XLSX and HOBO files Compatible Data Loggers * HOBO® MX1100 Series Temp/RH/CO2/Light/Analog Data Loggers * HOBO® MX2001 Water Level data logger * HOBO® MX100 Temperature data logger * HOBO® MX2200 Series Water Temp Data Loggers * HOBO® MX2300 Series Temp/RH/Soil Moisture data loggers * HOBO® MX2500 Series pH data loggers

Screenshots

HVAC Pipe Sizer4 screens
HOBOconnect4 screens

Verdict

The call

The clearest difference is review sentiment: HVAC Pipe Sizer at 100% against HOBOconnect's 8%. HVAC Pipe Sizer also leads on rating (5.0 vs 2.2). HOBOconnect's advantage is price (Free vs $4.99) and update cadence (every 6 weeks vs every 8 months). On ads, in-app purchases, 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

HOBOconnect is free to download; HVAC Pipe Sizer costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

HVAC Pipe Sizer holds the better App Store score, 5.0 against 2.2. That said, the two scores are not equally well evidenced: HOBOconnect has 29 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 100% of HVAC Pipe Sizer's written reviews are positive against 8% of HOBOconnect's.

UpkeepUpdate frequency

HVAC Pipe Sizer ships an update every 8 months, HOBOconnect every 6 weeks. The most recent releases landed on October 15, 2026 and October 12, 2026 respectively.

Scorecard6 real differences · 4 level
HVAC Pipe Sizer versus HOBOconnect: the parameters behind the verdict, then further details
ParameterHVAC Pipe SizerHOBOconnect
Price$4.99Free — better
Rating5.0 (3 ratings) — better2.2 (29 ratings)
Positive reviews100.0% of reviews — better8.3% of reviews
Number of ratings329 — better
Update frequencyEvery 8 monthsEvery 6 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.615.0 — better
Further details — not scored
Size17 MB94 MB
Age rating4+4+
DeveloperCarmel Software CorporationOnset Computer Corporation

Customer experience

HVAC Pipe Sizer

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews4 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

HOBOconnect

All ratings29 ratings
Positive20.7%
Neutral13.8%
Negative65.5%
Written reviews24 reviews
Positive8.3%
Neutral16.7%
Negative75.0%

In-app purchases

None

HVAC Pipe Sizer

No in-app purchases

None

HOBOconnect

No in-app purchases

Questions

Is HVAC Pipe Sizer free?
HVAC Pipe Sizer costs $4.99, with no in-app purchases.
Is HOBOconnect free?
HOBOconnect is free to download, with no in-app purchases.
Which has better reviews, HVAC Pipe Sizer or HOBOconnect?
HVAC Pipe Sizer is rated higher. HVAC Pipe Sizer averages 5.0 out of 5 from 3 ratings, while HOBOconnect averages 2.2 from 29 ratings.
Do HVAC Pipe Sizer or HOBOconnect have ads?
Neither HVAC Pipe Sizer nor HOBOconnect shows ads.
Which is updated more often, HVAC Pipe Sizer or HOBOconnect?
HVAC Pipe Sizer ships an update every 8 months, and HOBOconnect every 6 weeks. Most recently, HVAC Pipe Sizer was updated on October 15, 2026 and HOBOconnect on October 12, 2026.

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