Comparison

Quietflex Ductulator vs Digiduct

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

Head to head
About

Quietflex Ductulator

This utility app helps HVAC professionals and enthusiasts quickly calculate essential airflow metrics for various duct sizes. It provides CFM, FPM, and FL values, simplifying HVAC system design and analysis.

Highlights
  • Calculate CFM
  • Calculate FPM
  • Calculate FL
  • Supports different duct diameters
  • HVAC system analysis
Features
Read full description

Use the Quietflex Ductulator app to calculate CFM, FPM, and FL of different diameter ducts.

About

Digiduct

This HVAC tool assists professionals with duct sizing calculations based on ASHRAE standards. It supports multiple duct shapes and offers intelligent features to ensure accurate and reliable designs for real-world scenarios.

Highlights
  • Duct sizing for rectangular, round, and flat oval ducts
  • Customizable dimensions with locked values
  • Duct location intelligence for context-aware sizing
  • Calculations based on CFM, pressure drop, or velocity
  • Alerts for exceeding pressure drop or velocity limits
Features
Read full description

The Digiduct app is a powerful tool designed for HVAC professionals, supporting everything from design calculations to real-time field verification. Built utilizing the equations and recommendations from the ASHRAE Fundamentals – Duct Design chapter, it ensures your calculations are accurate and reliable, saving you time and reducing errors. Key Features: • Multiple Shape Sizing Options: Supports sizing for rectangular, round, and flat oval ducts, offering flexibility for various duct designs. • Customizable Dimensions: For rectangular and oval ducts, users can lock in one dimension, and the app calculates the other, ensuring precise results based on CFM, pressure drop due to friction, or velocity. • Duct Location Intelligence: offers the user predefined parameters to use as starting point and reference when selecting duct sizes so users at HVAC experience level can make confident selections. Why Choose Digiduct? Unlike other duct sizing tools, Digiduct goes above and beyond. It doesn’t just provide basic size outputs—it evaluates the location and context of your duct (high-pressure vs. low-pressure, shaft vs. plenum), alerting you if your selection exceeds maximum pressure drop or velocity limits. This added layer of intelligence ensures higher accuracy and gives users confidence that their sizing is optimal for the application. Get the assurance of precision with Digiduct—designed to meet the demands of real-world HVAC scenarios.

Screenshots

Quietflex Ductulator2 screens
Digiduct4 screens

Verdict

The call

The clearest difference is update cadence: Quietflex Ductulator at every 3 days against Digiduct's every 2 months. Quietflex Ductulator also leads on rating (5.0 vs 4.6) and monetization model (free vs ad-supported). Digiduct's advantage is ratings volume (11 vs 1). On price, ads, in-app purchases 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

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Quietflex Ductulator holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Digiduct has 11 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Quietflex Ductulator ships an update every 3 days, Digiduct every 2 months. The most recent releases landed on September 26, 2026 and October 1, 2026 respectively.

Scorecard5 real differences · 4 level
Quietflex Ductulator versus Digiduct: the parameters behind the verdict, then further details
ParameterQuietflex DuctulatorDigiduct
PriceFreeFree
Rating5.0 (1 ratings) — better4.6 (11 ratings)
Number of ratings111 — better
Update frequencyEvery 3 days — betterEvery 2 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterAd-supported
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS8.0 — better26.2
Further details — not scored
Size30 MB4 MB
Age rating4+4+
DeveloperGoodman Manufacturing L.P.Syska Hennessy Group

Customer experience

Quietflex Ductulator

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

Digiduct

All ratings11 ratings
Positive90.9%
Neutral0.0%
Negative9.1%

In-app purchases

None

Quietflex Ductulator

No in-app purchases

None

Digiduct

No in-app purchases

Questions

Is Quietflex Ductulator free?
Quietflex Ductulator is free to download, with no in-app purchases.
Is Digiduct free?
Digiduct is free to download, with no in-app purchases.
Which has better reviews, Quietflex Ductulator or Digiduct?
Quietflex Ductulator is rated higher. Quietflex Ductulator averages 5.0 out of 5 from 1 ratings, while Digiduct averages 4.6 from 11 ratings.
Do Quietflex Ductulator or Digiduct have ads?
Neither Quietflex Ductulator nor Digiduct shows ads.
Which is updated more often, Quietflex Ductulator or Digiduct?
Quietflex Ductulator ships an update every 3 days, and Digiduct every 2 months. Most recently, Quietflex Ductulator was updated on September 26, 2026 and Digiduct on October 1, 2026.

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