Comparison

Engineering Converter vs Duct Construction

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

Head to head
About

Engineering Converter

Features
Read full description

This engineering converter provides basic conversions between units of measure for common and engineering units. This app has the capability to convert units for the following types of measurement: Temperature Length Mass Mole Area Volume Time Velocity Acceleration Density Molar Density Molar Volume Force Pressure Energy Power Mass Flow Mole Flow Volume Flow Heat Capacity Molar Heat Capacity Latent Heat Molar Latent Heat Conductivity Viscosity Diffusivity Surface Tension

About

Duct Construction

This app helps determine duct construction and reinforcement options based on duct size and system pressure class. It provides condensed lists of suitable options, saving time spent on manual calculations and table lookups. Results are based on industry standards for galvanized steel duct sheets.

Highlights
  • Duct size range from 2" to 120"
  • Pressure classes up to 4 in.wg
  • Calculates duct weights per linear foot
  • Determines required duct gauge and reinforcement spacing
  • Clear illustrations for reinforcement types
  • Simple and effective UI design
Features
Read full description

Get all duct construction and reinforcement options by entering the duct size and system pressure class. The aim of the app is to save time spent browsing through tables and texts to determine suitable options, by relying on the most widely used standards and providing a condensed list of available duct construction options. The results are based on galvanized steel duct sheets conforming to ASTM A653 & A924. The app does not cover all aspects of duct construction, as it is intended as a guide; Reliance on related standards, as well as good engineering sense is the basis for proper design. Features: 1. Duct sizes from 2" to 120" 2. Pressure classes 0.5 in.wg, 1 in.wg, 2 in.wg, 3 in.wg and 4 in.wg. 3. Provides the duct weights for each option per linear foot. 4. Provides required duct gauge and reinforcement spacing. 5. Clear illustration for each reinforcement type, as well as dimensions. 6. Simple and effective UI design. Roadmap / Upcoming updates: 1. SI units. 2. More pressure class options. 3. User will be able to save and retreive duct data for future reference. 3. More Reinforcement options, including tie-rodding. Request a feature: welmurr@icloud.com

Screenshots

Engineering Converter1 screens
Duct Construction4 screens

Verdict

The call

The clearest difference is price: Engineering Converter at Free against Duct Construction's $0.99. Engineering Converter also leads on iOS requirement (15.0 vs 17.6). Duct Construction's advantage is ads (none vs shown) and update cadence (every 10 months vs every 42 months). On 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

Engineering Converter is free to download; Duct Construction costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Engineering Converter ships an update every 42 months, Duct Construction every 10 months. The most recent releases landed on September 12, 2026 and September 25, 2026 respectively.

Scorecard5 real differences · 6 level
Engineering Converter versus Duct Construction: the parameters behind the verdict, then further details
ParameterEngineering ConverterDuct Construction
PriceFree — better$0.99
Rating—1.0 (1 ratings) — better
Positive reviews—0.0% of reviews
Number of ratings—1 — better
Update frequencyEvery 42 monthsEvery 10 months — better
AdsYesNo — better
In-app purchasesNoNo
Monetization—Paid
Best chart rank—#184 — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better17.6
Further details — not scored
Size6 MB1 MB
Age rating4+4+
DeveloperBrook WallaceWassim Murr

In-app purchases

None

Engineering Converter

No in-app purchases

None

Duct Construction

No in-app purchases

Questions

Is Engineering Converter free?
Engineering Converter is free to download, with no in-app purchases.
Is Duct Construction free?
Duct Construction costs $0.99, with no in-app purchases.
Do Engineering Converter or Duct Construction have ads?
Engineering Converter shows ads; Duct Construction does not.
Which is updated more often, Engineering Converter or Duct Construction?
Engineering Converter ships an update every 42 months, and Duct Construction every 10 months. Most recently, Engineering Converter was updated on September 12, 2026 and Duct Construction on September 25, 2026.

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