Digiduct
Digiduct is an HVAC duct sizing utility for engineers and field professionals, providing ASHRAE-compliant calculations on iOS and Android.
The App DNA
What makes this app unique?
The tool replaces manual lookup tables with a dynamic calculation engine, removing the cognitive friction of onsite design verification.
For HVAC professionals and engineers requiring accurate, ASHRAE-compliant duct sizing calculations in the field or office.
What does it look like?
Key features
Evaluates duct context (high-pressure vs low-pressure, shaft vs plenum) and flags violations of maximum pressure drop or velocity limits.
Calculates dimensions for rectangular, round, and flat oval ducts based on CFM, velocity, or friction loss.
Allows adjustment of material-specific roughness parameters to increase calculation precision.
How much does it cost?
The app operates as a free professional utility, serving as a brand-building tool for Syska Hennessy Group.
Velocity
Maintenance developmentUX improvementsperformanceShow more...
Digiduct maintains a maintenance-level cadence, with only two distinct versions identified in the recent window. The latest release arrived 21 days ago, while the previous major update occurred 68 days ago on iOS. Development is currently focused on performance and stability, evidenced by the latest version addressing specific crash and export issues. There is no evidence of a shift toward live operations or high-frequency feature deployment.
Who built it?
User Sentiment
What do users think recently?
The recent review mood reads mixed. Users appreciate engineers and architects find the quick calculation tools useful for onsite professional tasks.
How are ratings & reviews evolving?
What users say, by theme
- Engineers and architects find the quick calculation tools useful for onsite professional tasks
- The latest update removed essential ductwork measurement features that users relied on daily
8 of 8 recent reviews analyzed · limited sample · Mixed overall
Read the full review analysisUnlock 1 more frustration theme, each backed by review evidence.
Access the full report for freeCompetition
Competitive landscape for Digiduct
How's the Utilities market?
Digiduct maintains a professional utility niche with a 4.63 rating on iOS and a 4.07 rating on Android. The lack of monetization gates signals the app functions as a brand-building asset rather than a direct revenue driver.
The rivals identified
The Analyst's Read
Key takeaways for Digiduct
Where is it heading?
The professional HVAC utility market is consolidating around tools that offer high-fidelity field verification. Digiduct's recent removal of core features leaves it vulnerable to competitors that maintain consistent, reliable calculation workflows.
- Removal of core air flow features in the latest update triggers professional user churn, which erodes the app's utility as a brand-building tool.
- Keyboard input failures in settings menus prevent custom parameter entry, which forces users to rely on default values and reduces calculation accuracy.
The SWOT
- Duct Location Intelligence flags pressure drop violations against ASHRAE limits
- Customizable roughness factors increase calculation precision for specialized materials
- Expand material-specific roughness library to capture niche engineering segments
Next best moves
Restore air flow calculation features because users report the current version is functionally incomplete → recover daily active user base
+ 1 more prioritized moveThe counter-intuitive read
The app's value is not the calculation engine itself…
Read the full takeBottom line
Restoring the removed air flow calculation features is necessary to recover the daily active user base, as the current version's functional gaps undermine the tool's core value proposition of professional-grade precision.
Unlock 2 critical frictions, 1 market threat, 1 more prioritized move and the analyst’s take.
Access the full report for freeFAQ
Is Digiduct suitable for professional HVAC engineering work?
Does Digiduct require a subscription to access advanced sizing features?
Are there any known issues with the latest version of Digiduct?
Sources
- [1] App Store listing
Report last updated