Comparison

HVAC Load Plus vs EcoMeter Pro

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

Head to head
About

HVAC Load Plus

Perform detailed heating and cooling load calculations for buildings in the field using your iPhone. Access a vast weather database and construction data to generate comprehensive reports that can be emailed or exported to spreadsheets.

Highlights
  • Detailed heating and cooling load calculations
  • 1000+ city weather database
  • Extensive construction type data
  • Unlimited project creation and storage
  • Comprehensive load breakdown reports
  • Emailable HTML reports with spreadsheet attachments
  • Company information display on reports
Features
Read full description

The HVAC Load+ iPhone app allows you to perform detailed heating and cooling block loads for small commercial and residential buildings out in the field by taking advantage of the simplicity and power of the iPhone. It performs heating and cooling block load calculations based upon industry standard calculation methods. The following is just a small sample of the features included in this app: 1. Includes a 1000+ world-wide city weather database 2. Includes data for 100s of construction types for walls, roofs, floors, doors, windows, skylights, ceilings, and more 3. Allows you to create and store an unlimited number of projects. You can also copy existing projects to new projects for easy reuse of data 4. Allows you to specify an unlimited # of opaque types (ie – doors, walls, roofs, floors, ceilings), window types, and skylight types for each building 5. Allows you to view comprehensive cooling and heating load breakdown reports including breakdown by opaque load, window load, skylight load, infiltration load, ventilation load and internal load contributions 6. Opaque inputs include opaque type, opaque construction number, dimensions, and opening areas 7. Window inputs include window type, internal and external shading type, overhang dimensions, window area, and more.. 8. Skylight inputs include skylight type, dimensions, orientation, and more.. 9. Additional input types include # of people, # of bedrooms, ventilation airflow, and more.. 10. Includes the ability to display a comprehensive HTML report that you can email to yourself or others, and it also includes a spreadsheet attachment that you can open in Excel to further massage data on your desktop 11. Includes ability to input your company information to display on the emailed report 12. Includes ability to display units in either English (IP) or Metric (SI). 13. Equipment location services It also includes 2 bonus modules: 1. The "HVAC Equipment Locator" has the same functionality as our stand-alone Locator app. It allows you to input information about all of your HVAC equipment, upload it to a remote web server (at www.carmelsoft.com/EL), and SAFELY share information about it with other technicians within your company. The equipment's GPS coordinates become its globally unique identifier, allowing you to input and retrieve information about it just by standing next to it. 2. The “HVAC Quick Load” module allows you to quickly perform rule-of-thumb heating and cooling load calcs based upon just inputting the building type, square area, and # of people. Please see the description located under the stand-alone "HVAC Quick Load" app for more details about it. The benefits of using this app are: 1. Great for use out in the field. Quickly size heating and cooling equipment, show the client, then email the results back to your office for further analysis. 2. Show off your advanced on-screen reports to clients convincing them you are using cutting-edge technology 3. Save time by inputting information in the field and then returning to your office to perform more in-depth analysis This app was designed by Carmel Software Corporation, a 20-year old software design firm specializing in engineering analysis software applications geared toward engineers, architects, technicians, and home owners. In fact, our software powers the analysis capabilities of major Autodesk software tools such as Revit (The makers of AutoCAD). We will continue to update this app based upon user feedback. Please email us at info@carmelsoft.com for any comments. We also offer training and tutorial videos at: www.carmelsoft.com/HVACLoadPlus.

About

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.

Highlights
  • Proportional airflow balancing workflow
  • Standalone single-system balance reports (PDF)
  • Outlet-level balancing summaries
  • Fast, repeatable field calculations
  • Customizable reports with company branding
Features
Read full description

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

HVAC Load Plus4 screens
EcoMeter Pro4 screens

Verdict

The call

The clearest difference is price: EcoMeter Pro at Free against HVAC Load Plus's $24.99. EcoMeter Pro also leads on rating (5.0 vs 2.8) and update cadence (daily vs every 9 months). HVAC Load Plus's advantage is chart position (#199 vs unranked) and ratings volume (5 vs 1). 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

EcoMeter Pro is free to download; HVAC Load Plus costs $24.99 up front. HVAC Load Plus sells 1 one-off in-app purchase and EcoMeter Pro sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

EcoMeter Pro holds the better App Store score, 5.0 against 2.8. That said, the two scores are not equally well evidenced: HVAC Load Plus has 5 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

HVAC Load Plus ships an update every 9 months, EcoMeter Pro daily. The most recent releases landed on September 9, 2026 and June 11, 2026 respectively.

Scorecard6 real differences · 5 level
HVAC Load Plus versus EcoMeter Pro: the parameters behind the verdict, then further details
ParameterHVAC Load PlusEcoMeter Pro
Price$24.99Free — better
Rating2.8 (5 ratings)5.0 (1 ratings) — better
Positive reviews60.0% of reviews—
Number of ratings5 — better1
Update frequencyEvery 9 monthsDaily — better
AdsNoNo
In-app purchasesYesYes
MonetizationPaidFree with in-app purchases — better
Best chart rank#199 — better—
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS13.013.0
Further details — not scored
Size18 MB51 MB
Age rating4+4+
DeveloperCarmel Software CorporationKYLE T WHITE

Customer experience

HVAC Load Plus

All ratings5 ratings
Positive40.0%
Neutral0.0%
Negative60.0%
Written reviews15 reviews
Positive60.0%
Neutral20.0%
Negative20.0%

EcoMeter Pro

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

HVAC Load Plus

One-time1
  • HVAC Equipment Locator$9.99
2 purchases

EcoMeter Pro

Subscriptions2
  • EcoMeter Standard – Monthly1 Month trial$4.991 Month
  • EcoMeter Standard – Yearly1 Month trial$39.991 Year

Questions

Is HVAC Load Plus free?
HVAC Load Plus costs $24.99, and also offers in-app purchases.
Is EcoMeter Pro free?
EcoMeter Pro is free to download, with in-app purchases available.
Which has better reviews, HVAC Load Plus or EcoMeter Pro?
EcoMeter Pro is rated higher. HVAC Load Plus averages 2.8 out of 5 from 5 ratings, while EcoMeter Pro averages 5.0 from 1 ratings.
Do HVAC Load Plus or EcoMeter Pro have ads?
Neither HVAC Load Plus nor EcoMeter Pro shows ads.
Which is updated more often, HVAC Load Plus or EcoMeter Pro?
HVAC Load Plus ships an update every 9 months, and EcoMeter Pro daily. Most recently, HVAC Load Plus was updated on September 9, 2026 and EcoMeter Pro on June 11, 2026.

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