Comparison

Installer App vs DuctCalc.Ca

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

Head to head
About

Installer App

This app provides HVAC professionals with a digital toolbox for everyday tasks. It offers product information, installation guides, and advanced features to streamline work, including project management and hydronic balancing tools.

Highlights
  • Radiator Presetting
  • Product Finder
  • My Projects (Cloud-based)
  • Hydronic Balancing
  • Flow/Pressure Calculator
  • Floor Heating Tools
  • Burner Converter
  • Magnetic Tool
Features
Read full description

The Danfoss Installer app is an all-in-one digital toolbox that helps plumbers, heating and HVAC professionals, service technicians, engineers, and installers with your everyday tasks. For projects big and small, our comprehensive toolbox equips you with the latest product information, installation guides and advanced features to streamline your work, making your daily tasks easier. Simplify project management with customizable databases to track your work and pick up where you left off, anytime you need. The Danfoss Installer app offers a collection of useful tools and features: Radiator Presetting Set proper values based on valve, sensor, and radiator type, or alternatively by room size and heat loss. Get the heat emission, flow, and presetting right every time. Product Finder Search and access comprehensive product information, documentation, and details. Download Danfoss product documentation directly in the app. My Projects Make project management easier by creating a list of your clients and jobs, saving contact and building information, calculating system properties, and presetting for radiator and underfloor heating. Cloud-based, My Projects allows you to save everything in one spot for easy overview and fast access across all your devices. Hydronic Balancing Determine accurate system heat output with precise flow calculations. Tailor settings to valve type, handle position, and measured pressure. Flow/Pressure calculator Calculate, convert, or verify pressure, flow, power, and temperature (values or units). Floor heating Specify circuit lengths and calculate presetting for your floor heating manifolds. Select floor heating pipe type and dimensions, define heat loss, and divide rooms into circuits. Burner Converter Modify burner components and find spare parts in a matter of seconds, while keeping an overview of product updates and alternatives. Magnetic Tool Test solenoid valve coils quickly and easily. If the wheel rotates, your valve is good to go. Timer Replacement Select the appropriate timer replacement for a Danfoss or third-party unit. Installation guides are available as well. Feedback Your input matters, and we're committed to continuously improving Installer App to meet your needs. If you encounter a bug or have a feature suggestion, please use the in-app feedback function available in Settings. Alternatively, you can reach us via email at coolapp@danfoss.com. Danfoss Climate Solutions At Danfoss Climate Solutions, we engineer energy-efficient solutions to help the world get more out of less. Our innovative products and solutions enable a decarbonized, digital, and more sustainable tomorrow, and our technology supports a cost-efficient transition to renewable energy sources. With a strong foundation in quality, people, and the climate, we drive the energy, refrigerant, and food system transitions needed to achieve climate goals. Read more about us at www.danfoss.com. Terms and Conditions apply for use of the app.

About

DuctCalc.Ca

This utility app calculates duct dimensions and air velocity using two methods: Equal Friction and Velocity. It supports both round and rectangular ducts, offering precise calculations for HVAC professionals. Offline functionality is available with a subscription.

Highlights
  • Duct sizing calculator
  • Equal Friction Method
  • Velocity Method
  • Round and rectangular duct support
  • Offline functionality
  • Full air flow range activation
Features
Read full description

DuctCalc.Ca is the iOS offline version of the most popular online ductulator app (ductcalc.ca) Enjoy using the app with no internet connection when subscribed! App engineering explanation: ------------------------------ Equal Friction Method: Using a predefined static pressure loss per unit of duct length, DuctCalc.Ca Ductulator App calculates the diameter of round duct and the other dimension of rectangular duct. Based on the calculated dimensions, the air velocity will be calculated for both duct shapes and dimensions. Velocity Method: Using a predefined air velocity, DuctCalc.Ca Ductulator App calculates the diameter of round duct and the other dimension of a rectangular duct. Based on the calculated dimensions, the static pressure loss will be calculated for both duct shapes and dimensions. Note that unlike conventional ductulators, this ductulator will calculate the dimensions of the rectangular duct based on the given velocity and it then calculates the static pressure loss for the rectangular duct based on the given velocity and dimensions. Most old calculators will only use the given velocity to calculate the diameter of the round duct then it calculates the static pressure loss for the round duct and uses that static pressure to calculate the rectangular duct dimensions which is not the case here for more precise velocity output. Colebrook equation is used to solve for Darcy's friction factor and calculates the static pressure loss in the duct until it matches the desired input at defined airflow and absolute roughness of the inner material of the duct touching the moving air. In-App Purchases: ------------------- • With no subscription the app will calculate for an air flow range between (950 and 1100 [cfm]). To activate full air flow functionality. There are four subscription options: one month, three months, six months and one year. • All subscription options will activate the "Full Air Flow Functionality" of the duct sizing app for that specific subscription period. The full air flow range is (1 to 500,000 [CFM] or 1 to 235,974 [L/s] in metric units). • Payment will be charged to iTunes Account at confirmation of purchase. • Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable. Privacy Policy: https://ductcalc.ca/?page=agreement Terms of Service: https://ductcalc.ca/?page=agreement

Screenshots

Installer App4 screens
DuctCalc.Ca1 screens

Verdict

The call

The clearest difference is rating: Installer App at 3.0 against DuctCalc.Ca's 1.9. Installer App also leads on in-app purchases (none vs 4) and update cadence (every 5 weeks vs every 4 months). DuctCalc.Ca's advantage is iOS requirement (11.3 vs 15.0). On price, review sentiment, ratings volume and ads 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

Both are free to download. DuctCalc.Ca sells 4 one-off in-app purchases. Installer App asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Installer App holds the better App Store score, 3.0 against 1.9. Both are backed by a comparable volume of ratings — 7 and 20 respectively. Written reviews split almost evenly too, at 50% and 50% positive.

UpkeepUpdate frequency

Installer App ships an update every 5 weeks, DuctCalc.Ca every 4 months. The most recent releases landed on September 1, 2026 and October 1, 2026 respectively.

Scorecard5 real differences · 5 level
Installer App versus DuctCalc.Ca: the parameters behind the verdict, then further details
ParameterInstaller AppDuctCalc.Ca
PriceFreeFree
Rating3.0 (7 ratings) — better1.9 (20 ratings)
Positive reviews50.0% of reviews50.0% of reviews
Number of ratings720 — better
Update frequencyEvery 5 weeks — betterEvery 4 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.011.3 — better
Further details — not scored
Size90 MB9 MB
Age rating4+4+
DeveloperDanfoss A/SFiras Kneifati

Customer experience

Installer App

All ratings7 ratings
Positive42.9%
Neutral0.0%
Negative57.1%
Written reviews4 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

DuctCalc.Ca

All ratings20 ratings
Positive20.0%
Neutral5.0%
Negative75.0%
Written reviews14 reviews
Positive50.0%
Neutral7.1%
Negative42.9%

In-app purchases

None

Installer App

No in-app purchases

4 purchases

DuctCalc.Ca

One-time4
  • One Month Full Air Flow$6.99
  • Three Months Full Air Flow$17.99
  • Six Months Full Air Flow$29.99
Show 1 more
  • One Year Full Air Flow$49.99

Questions

Is Installer App free?
Installer App is free to download, with no in-app purchases.
Is DuctCalc.Ca free?
DuctCalc.Ca is free to download, with in-app purchases available.
Which has better reviews, Installer App or DuctCalc.Ca?
Installer App is rated higher. Installer App averages 3.0 out of 5 from 7 ratings, while DuctCalc.Ca averages 1.9 from 20 ratings.
Do Installer App or DuctCalc.Ca have ads?
Neither Installer App nor DuctCalc.Ca shows ads.
Which is updated more often, Installer App or DuctCalc.Ca?
Installer App ships an update every 5 weeks, and DuctCalc.Ca every 4 months. Most recently, Installer App was updated on September 1, 2026 and DuctCalc.Ca on October 1, 2026.

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