HVAC Toolkit vs EcoMeter Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
HVAC Toolkit
This comprehensive toolkit offers essential HVAC calculations and tools for professionals. It combines multiple specialized applications into a single, convenient package for iPhone and iPad users.
- Equipment tracking and customization
- Refrigerant pressure-temperature charts
- Refrigerant charge calculations
- Duct sizing
- Cooling and heating load calculations
- Psychrometric calculations
- Steam tables
- Pipe sizing for liquid, steam, and gas
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The HVAC Toolkit app for the iPhone and iPad is the essential app for anyone in the HVAC industry. It includes a combination of many of our stand-alone iOS applications. Individually, the apps cost a total of $70. By purchasing the Toolkit, you pay only $24: 1. HVAC Equipment Locator 2. HVAC PT Chart 3. HVAC Refrigerant Charge 4. HVAC Duct Sizer 5. HVAC Quick Load 6. Psychrometrics 7. Steam Tables 8. Pipe Sizer - Liquid 9. Pipe Sizer - Steam 10. Pipe Sizer - Gas High 11. Pipe Sizer - Gas Low This is a universal app that works on both the iPhone and iPad. The "HVAC Equipment Locator" module allows you to track, share, and customize your equipment nameplate and maintenance data. The version here includes the ability to customize your input screens. The "HVAC PT Chart" module allows you to easily view the pressure-temperature properties of 75 refrigerants. Think of this app as a digital version of the paper PT charts that you may have carried around with you in the past. The "HVAC Refrigerant Charge" module allows you to perform superheat and subcool refrigerant charge calculations on-the-fly. This app includes pressure-temperature data for over 75 common refrigerants. The "HVAC Duct Sizer" module allows you to quickly size one HVAC duct run and a range of duct sizes. You can specify the total airflow in CFM (or L/s), the aspect ratio and one of either the velocity of air or the friction loss per 100 feet (30 meters). The "HVAC Quick Load" module allows you to perform quick and simple HVAC cooling and heating load calculation analysis. You can specify the building type, total area, and # of people. The results include the total cooling and heating loads and airflows. The "Psychrometrics" module allows you to easily perform single-state and mixed-air HVAC psychrometric calculations for a wide range of barometric air pressures. The "Steam Tables" module allows you to calculate the properties of saturated or superheated steam by specifying 2 input properties. The "HVAC Pipe Sizer - Liquid" module allows you to size a pipe run with many different types of liquids (or fluids), pipe material and fitting types. The "HVAC Pipe Sizer - Steam" module allows you to size a steam pipe run, and it also includes a bonus steam table calculator. The "HVAC Pipe Sizer - Gas High/Low" module allows you to quickly size a simple low (less than or equal to 1.5 psi) and high (greater than 1.5 psi) pressure gas piping system by inputting a number of piping and gas properties. This application includes all of the great features of the individual HVAC iOS applications such as the use of slider controls that allow you to quickly increment or decrement the input values and immediately observe the calculated results. It also allows you to specify different types of liquids, gases, pipe material types, fitting quantities, min and max ranges, and step values. All of the above modules display units in English or Metric. Also, all of the above modules allow you to send emails with inputs and results. The "HVAC Toolkit" 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, Carmel has developed customized apps for organizations such as ASHRAE, Mitsubishi Electric, and Pacific Gas and Electric, amongst others. We also offer all of the above modules as individual apps for the iPhone/iPad: 1. HVAC ResLoad-J 2. HVAC Psych HD 3. HVAC Duct Sizer 4. HVAC Pipe Sizers 5. Steam Tables 6. Psychrometric Plus 7. Psychrometric LT 8. HVAC Pipe Sizer Plus 9. HVAC Pipe Sizer Gas Plus 10. HVAC Quick Load 11. HVAC Load Plus 12. HVAC Residential Load Calcs 13. HVAC Toolkit Ultimate 14. HVAC ASHRAE 62.1 15. HVAC ResVent 62.2 16. HVAC ASHRAE DFDB 17. HVAC ASHRAE Psych Chart
EcoMeter Pro
This tool streamlines HVAC airflow balancing and reporting for technicians. It guides users through proportional balancing and generates professional PDF reports for residential and light commercial applications, ensuring speed and accuracy in the field.
- Proportional airflow balancing workflow
- Standalone single-system balance reports (PDF)
- Outlet-level balancing summaries
- Fast, repeatable field calculations
- Customizable reports with company branding
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EcoMeter Pro is an HVAC airflow balancing and reporting tool designed to help field technicians produce accurate, professional results with speed and consistency. Built around real-world field workflows, EcoMeter Pro guides technicians through proportional balancing, supports single-system documentation, and generates clean, professional PDF reports suitable for residential and light commercial applications. Key features include: - ProPortional airflow balancing workflow - Standalone single-system balance reports (PDF) - Outlet-level balancing summaries with tolerance tracking - Fast, repeatable field calculations - Customizable reports with company branding EcoMeter Pro is designed for HVAC technicians, installers, and startup commissioning teams looking to improve accuracy, consistency, and professionalism in the field. Additional workflows, including expanded system and hydronic tools, are planned for future updates.
Screenshots
Verdict
The clearest difference is price: EcoMeter Pro at Free against HVAC Toolkit's $23.99. EcoMeter Pro also leads on update cadence (daily vs every 6 months). HVAC Toolkit's advantage is in-app purchases (none vs 2). On rating, ratings volume, ads 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
EcoMeter Pro is free to download; HVAC Toolkit costs $23.99 up front. EcoMeter Pro sells 2 in-app purchases, starting at $4.99 per month. HVAC Toolkit asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for HVAC Toolkit against 5.0 for EcoMeter Pro. Both are backed by a comparable volume of ratings — 2 and 1 respectively.
HVAC Toolkit ships an update every 6 months, EcoMeter Pro daily. The most recent releases landed on September 14, 2026 and June 11, 2026 respectively.
| Parameter | HVAC Toolkit | EcoMeter Pro |
|---|---|---|
| Price | $23.99 | Free — better |
| Rating | 5.0 (2 ratings) | 5.0 (1 ratings) |
| Positive reviews | 73.3% of reviews | — |
| Number of ratings | 2 — better | 1 |
| Update frequency | Every 6 months | Daily — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 | 13.0 |
| Further details — not scored | ||
| Size | 50 MB | 51 MB |
| Age rating | 4+ | 4+ |
| Developer | Carmel Software Corporation | KYLE T WHITE |
Customer experience
HVAC Toolkit
EcoMeter Pro
In-app purchases
HVAC Toolkit
No in-app purchases
EcoMeter Pro
- EcoMeter Standard – Monthly1 Month trial$4.991 Month
- EcoMeter Standard – Yearly1 Month trial$39.991 Year





