Allday HVAC Calc is a mobile utility for HVAC engineers that provides psychrometric, pipe, and duct calculation modules on iOS and Android.
The App DNA
What makes this app unique?
The tool removes the cognitive friction of manual engineering lookups by providing interdependent calculations and reference formulas in a single, portable interface.
For HVAC engineers and technicians requiring mobile-accessible, standardized engineering calculations for air and fluid systems.
What does it look like?
Key features
Determines air properties including humidity ratio, enthalpy, and vapor pressure from dry-bulb, wet-bulb, and relative humidity inputs.
Calculates velocity and pressure loss with interdependent flow rate, heat load, and temperature variables.
Calculates speed and pressure loss for round, rectangular, and oval ducts with reverse calculation for power and flow rate.
How much does it cost?
The app operates as a free, ad-free utility with no monetization, likely serving as a professional portfolio or reference tool for the developer.
Velocity
Maintenance developmentUX improvementsperformanceShow more...
Allday HVAC Calc currently operates on a maintenance cadence, with only one release identified in the analyzed window. The latest update, released 155 days ago, focused on technical enhancements to the pipe calculator and unit conversion logic. There is no evidence of active development or live operations, as the release history shows a significant period of inactivity. Future updates remain infrequent, consistent with a product that has reached a stable, feature-complete state.
Who built it?
User Sentiment
What do users think recently?
Recent user voice shows a thrilled sentiment. Users appreciate hvac technicians find the toolset elegant and functional for their daily professional field calculations.
How are ratings & reviews evolving?
What users say, by theme
- HVAC technicians find the toolset elegant and functional for their daily professional field calculations
2 of 2 recent reviews analyzed · limited sample
Read the full review analysisCompetition
Competitive landscape for Allday HVAC Calc
How's the Utilities market?
Allday HVAC Calc occupies a niche utility space for HVAC professionals, maintaining a 5.0-star rating despite a 155-day update gap. The absence of monetization signals a focus on professional utility over market share capture.
Read the market outlookThe rivals identified
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Access the full report for freeThe Analyst's Read
Key takeaways for Allday HVAC Calc
Where is it heading?
The HVAC utility market is shifting toward cloud-integrated workflows that allow for cross-device project management. Allday HVAC Calc remains a stable, high-utility reference tool, but its lack of cloud synchronization leaves it exposed to competitors that offer persistent project storage.
- The 155-day maintenance gap indicates the developer is prioritizing stability over new feature expansion, which limits long-term growth potential.
The SWOT
- Interdependent calculation logic reduces manual data entry for engineers
- Dual SI and IP unit support expands utility across international standards
- Reference formula transparency builds professional trust in calculation outputs
- Integration of cloud-based project saving would address the lack of persistent data storage
Next best moves
Audit user-requested features because the current 155-day maintenance gap risks user churn → increase retention
The counter-intuitive read
The app's lack of monetization is its primary competitive barrier…
Read the full takeBottom line
Allday HVAC Calc maintains a high-utility baseline for field engineers, but the maintenance-only cadence risks losing ground to rivals that integrate cloud-based project management into their calculation workflows.
Unlock 3 critical frictions, 1 market threat and the analyst’s take.
Access the full report for freeFAQ
Is Allday HVAC Calc suitable for professional HVAC engineering work?
Does Allday HVAC Calc contain ads or in-app purchases?
What are the limitations of using Allday HVAC Calc?
Sources
- [1] App Store, source
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