Fan Law Calculator
By Pheinex
Fan Law Calculator is a professional HVAC engineering utility for calculating airflow, rpm, and pressure changes on iOS.
The App DNA
What makes this app unique?
It replaces manual, error-prone calculation lookups with a real-time, interactive graph interface, saving design time for engineers.
For Qualified HVAC engineers and designers requiring quick performance impact estimations for air handling systems.
What does it look like?
Key features
Calculates performance changes for airflow, rpm, pressure, and power using standard fan law formulas.
Adjusts airflow values by dragging on the graph view to trigger real-time calculation updates.
Calculations update automatically as users type new values into text fields.
How much does it cost?
Paid model at $9.99 provides full access to the utility without recurring subscription costs.
Velocity
Dormant developmentopaqueShow more...
Fan Law Calculator has not received a feature update or bug fix in 988 days. Development activity is non-existent, and the app remains in a state of total stagnation. Given the lack of updates for over two years, the project appears to be abandoned.
Who built it?
Pheinex
4 apps tracked · Productivity
Pipe Sizer - Water
Psychrometric Chart
Duct CalculatorUser Sentiment
What do users think recently?
Fresh user feedback skews thrilled. Users appreciate the application performance remains stable and reliable for professional engineering tasks during daily usage.
How are ratings & reviews evolving?
What users say, by theme
- The application performance remains stable and reliable for professional engineering tasks during daily usage
1 of 1 recent reviews analyzed · limited sample
Read the full review analysisCompetition
Competitive landscape for Fan Law Calculator
How's the Productivity market?
Fan Law Calculator operates as a specialized productivity tool for HVAC professionals, maintaining a 5-star rating despite a 32-month update gap. The $9.99 price point positions it as a professional-grade utility rather than a mass-market tool.
Read the market outlookThe rivals identified
Unlock the deeper market read.
Access the full report for freeThe Analyst's Read
Key takeaways for Fan Law Calculator
Where is it heading?
The HVAC engineering utility market is consolidating around accessible, web-based tools that offer free, real-time calculations. Fan Law Calculator's reliance on a paid-upfront model without recent updates leaves it exposed to these free alternatives, which will likely erode its market share if the app remains in maintenance mode.
- The app remains in a maintenance-only state with no major updates for 32 months, signaling a stable but stagnant product lifecycle.
- The 5-star rating among professional users indicates that the core utility remains functional and meets the needs of its target audience.
The SWOT
- Interactive graph manipulation provides a visual interface for professional HVAC design tasks
- Localized HVAC standards could be added to expand the utility into international engineering markets
Next best moves
Audit the codebase for compatibility with current iOS standards because the app has not been updated in 989 days → prevent future OS-level crashes
+ 1 more prioritized moveThe counter-intuitive read
The lack of updates is not necessarily a failure…
Read the full takeBottom line
Fan Law Calculator provides a stable, professional-grade utility, but the 32-month development silence threatens its long-term viability against web-based alternatives. A technical audit is required to ensure the app remains functional on current hardware, protecting the existing user base from sudden churn.
Unlock 1 critical friction, 1 market threat, 1 more prioritized move and the analyst’s take.
Access the full report for freeFAQ
Is Fan Law Calculator suitable for professional HVAC design?
Does Fan Law Calculator require an internet connection?
Are there free alternatives to Fan Law Calculator?
Sources
- [1] App Store
Report last updated