Report updated Jun 18, 2026
HVAC Formulas Tech Calculator
For hVAC technicians requiring quick access to industry-specific formulas and calculations while in the field.
HVAC Formulas Tech Calculator is an established utilities app that is completely free. With a 3.8/5 rating from 14 reviews, it shows polarized user reception.
What is HVAC Formulas Tech Calculator?
HVAC Formulas Tech Calculator is a specialized utility app providing engineering formulas and fan law calculations for HVAC technicians on iOS.
Technicians hire this app to eliminate manual data entry and web searching while in the field, ensuring rapid access to critical system calculations.
Current Momentum
v1.37 · 61mo ago
Zombie- No feature updates since May 2021.
- Maintains static free-utility model.
What makes this app unique?
What Does It Look Like?
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What Are The Key Features?
Includes specialized calculations for mixed air, latent heat, sensible heat, enthalpy, and fan laws.
Automates calculations for RPM, CFM, and inches of water column.
Computes return coil air temperature to eliminate repeated manual data entry.
How much does it cost?
- Free
The app is currently offered as a free utility with no visible monetization gates or subscription tiers.
Who Built It?
Sergio Bost
View Publisher Intel →Enrichment in progress
Publisher profile available very soon
What other apps does Sergio Bost make?
What do users think recently?
Analysis in progress, available soon
View the full user-sentiment analysis
Mood gauge, ratings & review-volume history, every praise / complaint / request, and sentiment over time.
What is the competitive landscape for HVAC Formulas Tech Calculator?
Where is it available?
Localized markets (1)
How's The Utilities Market?
**Pricing Strategy**: Currently a free utility with no monetization gates, which lowers the barrier to entry but fails to capture value from professional users. **Target Audience**: Field-based HVAC technicians who require rapid, reliable access to industry-specific formulas without the overhead of complex engineering software.
Which niche is HVAC Formulas Tech Calculator in?
to calculate hvac system formulas efficiently
Explore the full Hvac Engineering Calculators niche
Every app in this space — 5 tracked, the niche's live rankings, and Marlvel's editorial take on the job-to-be-done.
The rivals identified
Nemeses(1)
This app directly targets HVAC technicians with specialized engineering calculations, mirroring the core utility and professional audience of the target app.
Differentiators
- Offers advanced psychrometric analysis tools that provide deeper technical insights than standard HVAC formula calculators.
- Maintains a high release cadence, ensuring compatibility with the latest iOS versions and modern hardware standards.
- Provides a dual-function interface that simplifies complex duct sizing tasks for field technicians on the go.
Head to head
The target app must prioritize updating its formula library and UI to match the professional standard set by DuctCalc to prevent user churn.
Contenders(1)
This app competes for the same niche professional audience by offering specific HVAC-related productivity calculations.
Differentiators
- Includes specialized SFP calculations that are highly relevant for energy-efficient ventilation system design and auditing.
- Focuses on heat recovery efficiency metrics which are critical for modern sustainable HVAC installation projects.
Same space(4)
While broader in scope, this tool is used by technicians for physical measurements often required during HVAC ductwork installation.
Differentiators
- Integrates camera-based measurement technology allowing users to calculate angles directly from their device's viewfinder.
- Provides real-time visual feedback that assists in quick physical alignment tasks on job sites.
This utility app shares the 'technical calculator' category, appealing to professionals who require precise, multi-functional calculation tools.
Differentiators
- Features a comprehensive IP calculator and bandwidth validation toolset for network-focused technical professionals.
- Offers advanced resolution scaling and link calculation features that cater to IT and AV infrastructure installers.
This is a professional-grade version of a measurement tool that overlaps with the physical installation needs of HVAC technicians.
Differentiators
- Includes robust data documentation features that allow users to save and export measurements for project reports.
- Utilizes advanced image analysis algorithms to provide higher precision than standard digital angle measurement tools.
This app serves as a specialized reference and calculation utility for a technical field, mirroring the target's 'reference' value proposition.
Differentiators
- Provides deep integration with proprietary technical support databases, creating a high barrier to entry for competitors.
- Offers a highly specialized suite of biological calculators that serve as an industry standard for researchers.
New entrants(2)
This app enters the utility space with a focus on material calculations, competing for the attention of construction-related tradespeople.
Differentiators
- Features a bilingual interface that significantly lowers the barrier to entry for diverse construction workforces.
This newcomer provides structural analysis tools that overlap with the technical calculation needs of HVAC and building systems engineers.
Differentiators
- Allows users to save and load complex beam configurations, significantly improving workflow efficiency for structural analysis.
Compare HVAC Formulas Tech Calculator against every rival
All rivals in one side-by-side table — identity, store metrics, ratings & sentiment, and strategic intel — plus a head-to-head page for each.
The outtake for HVAC Formulas Tech Calculator
Strengths to defend, gaps to attack
Core Strengths
- Specialized formula library functions as a core utility for field-based troubleshooting.
Critical Frictions
- No updates since May 2021 creates a perception of abandonment.
- Lack of cloud-save features prevents cross-device workflow.
Growth Levers
- Integration of wearable-based measurement tools could differentiate the app from standard calculator-only competitors.
Market Threats
- Competitors like DuctCalc maintain a higher release cadence, ensuring compatibility with modern hardware.
What are the next best moves?
Refresh the formula library and UI because the app has not been updated since May 2021 → prevent user churn to active rivals.
The app has not received a technical update since May 2021, creating a significant competitive disadvantage against active rivals.
Trade-off: Pause the development of new, non-essential formula modules to focus on core technical debt.
A counter-intuitive read
The app's lack of monetization is not a strength but a strategic weakness, as it prevents the developer from funding the update cadence required to compete with modern, paid engineering tools.
Feature Gaps vs Competitors
- Advanced psychrometric analysis (available in DuctCalc but missing here)
- Cloud-based project reporting (available in Angle Meter PRO but missing here)
Key Takeaways
HVAC Formulas Tech Calculator provides essential field utility, but the lack of updates since 2021 risks total user churn to more active competitors, so the PM must prioritize a technical refresh to maintain relevance.
Where Is It Heading?
Declining
The HVAC utility market is consolidating around apps that offer frequent technical updates and modern interface standards. This app's stagnant release history leaves it exposed to competitors that can better support the evolving needs of field technicians, which will likely lead to a continued decline in user engagement.
The lack of updates since May 2021 indicates the app is in maintenance mode, which erodes user trust as hardware standards evolve.
Competitors like DuctCalc maintain a higher release cadence, which directly threatens this app's market share by offering superior technical depth and compatibility.