--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "HVAC Formulas Tech Calculator" developer_entity: "Sergio Bost" bundle_id: "com.UDT.HVACWORKS" app_store_id: "1551053530" category: "Utilities" primary_platform: "ios" primary_monetization: "Free" offline_capable: false market_region: "US" platforms: "iOS" app_last_updated: "2021-05-20" report_date: "2026-06-18" last_verified: "2026-06-18T23:32:55.415Z" report_version: "1.37.13" total_reviews: 14 overall_rating: 3.79 confidence: "low" confidence_score: 0.2 data_age_days: 13 momentum_velocity: "zombie" intelligence_version: 3 nemesis: "Duct Calculator - DuctCalc" competitor_count: 8 tags: ["utilities", "free", "mobile app", "app review", "app analysis", "technicians", "requiring", "quick"] canonical_url: "https://marlvel.ai/intel-report/utilities/hvac-formulas-tech-calculator" license: "CC-BY-NC 4.0" content_version: "v2" --- # HVAC Formulas Tech Calculator App Audit ## TL;DR {#tldr} - **Category**: Utilities · Free - **Signal**: Rating 3.79 > **TL;DR:** HVAC Formulas Tech Calculator is a utilities app by Sergio Bost, rated 3.79/5 by 14 users, available on iOS. > > **Marlvel.ai App Intelligence** — Independent analysis. US Market. No publisher influence. > **Key Insight:** HVAC Formulas Tech Calculator is a utilities app by Sergio Bost. ## Quick Facts | Fact | Value | | :--- | :--- | | **Rating** | 3.79/5 (14 reviews) | | **Category** | Utilities | | **Developer** | Sergio Bost | | **Pricing** | Free | | **Platforms** | iOS | | **Confidence** | Low (0.2/1.0) | | **Data Age** | 0d | ## Metadata & Market Performance - **Publisher:** Sergio Bost - **Category:** Utilities - **Target Audience:** HVAC technicians requiring quick access to industry-specific formulas and calculations while in the field. - **Platforms:** iOS - **Version Audited:** 1.37.13 - **Audit Date:** 2026-06-18 - **Signal Count:** 2 reviews analyzed - **Confidence:** Low (0.2/1.0) - **App Store ID (iOS):** 1551053530 - **Bundle ID:** com.UDT.HVACWORKS - **Performance Trend:** Declining - **Data Window:** Analysis based on signals collected up to 2026-06-18 ## Executive Snapshot **What it is:** HVAC Formulas Tech Calculator is a specialized utility app providing engineering formulas and fan law calculations for HVAC technicians on iOS. **Why users hire it:** Technicians hire this app to eliminate manual data entry and web searching while in the field, ensuring rapid access to critical system calculations. ## App DNA (Features & Intent) - **[Differentiator] HVAC-Specific Formula Library:** Includes specialized calculations for mixed air, latent heat, sensible heat, enthalpy, and fan laws. * *User Intent:* Users expect intelligent, adaptive experiences that learn from their behavior. - **[Differentiator] Fan Law Calculator:** Automates calculations for RPM, CFM, and inches of water column. - **[Differentiator] Mixed Air Temperature Calculator:** Computes return coil air temperature to eliminate repeated manual data entry. * *User Intent:* Users expect intelligent, adaptive experiences that learn from their behavior. ## Market Position {#market-position} The app maintains a 3.78 rating across 14 reviews, but the lack of updates since May 2021 signals a stagnant market position relative to active competitors. ## Monetization Strategy - **Model:** Free - **Tiers:** Free - **Analysis:** The app is currently offered as a free utility with no visible monetization gates or subscription tiers. ## SWOT Analysis {#swot} **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. ## Recent Changes (v2 → v3) {#recent-changes} The app's competitive position has declined due to the formal identification of specific technical feature gaps and the emergence of more active, content-rich rivals. **Overall trend**: Declining **Compared at**: 2026-06-18 ### High-impact changes - **[Added] Formalized Feature Gaps** (features) — Added 'Advanced psychrometric analysis' and 'Cloud-based project reporting' as missing capabilities. - **[Shifted] Competitive Landscape Update** (positioning) — Shifted from a general nemesis overview to a specific comparison against Duct Calculator (DuctCalc), which offers superior technical depth. ### Medium-impact changes - **[Added] New Weakness: Lack of Cloud-Save** (swot) — Added 'Lack of cloud-save features prevents cross-device workflow' to the weaknesses list. ## Rivals Landscape {#rivals} > Competitive positioning identified by AI analysis of app features, category, and market signals. ### HVAC Formulas Tech Calculator vs Duct Calculator - DuctCalc — Head to Head - **[Duct Calculator - DuctCalc](https://marlvel.ai/intel-report/utilities/duct-calculator-ductcalc)** by Mikhail Nikitin: This app directly targets HVAC technicians with specialized engineering calculations, mirroring the core utility and professional audience of the target app. - **Key differences:** - 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. - **Where HVAC Formulas Tech Calculator wins:** - ✅ Broader scope of general HVAC formulas covering a wider variety of daily technician tasks. - ✅ Simpler, more accessible interface for technicians who need quick answers without complex engineering inputs. - **Where Duct Calculator - DuctCalc wins:** - ❌ Superior technical depth with specialized psychrometric and duct sizing modules for advanced engineering needs. - ❌ Higher user trust and engagement driven by frequent updates and a more modern, polished UI. - **Verdict:** The target app must prioritize updating its formula library and UI to match the professional standard set by DuctCalc to prevent user churn. ### Contenders (Strong Challengers) - **[HVAC-calculator](https://marlvel.ai/intel-report/productivity/hvac-calculator)** by Trond Rossvoll: This app competes for the same niche professional audience by offering specific HVAC-related productivity calculations. - 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. ### Peers (What They Do Better) - **[NEB Tools](https://marlvel.ai/intel-report/reference/neb-tools)** by New England Biolabs Inc: This app serves as a specialized reference and calculation utility for a technical field, mirroring the target's 'reference' value proposition. - 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. - **[Angle Meter PRO](https://marlvel.ai/intel-report/utilities/angle-meter-pro)** by nakhon phagdeechat: This is a professional-grade version of a measurement tool that overlaps with the physical installation needs of HVAC technicians. - 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. - **[ResEditor](https://marlvel.ai/intel-report/utilities/reseditor)** by Christopher Van Hoose: This utility app shares the 'technical calculator' category, appealing to professionals who require precise, multi-functional calculation tools. - 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. - **[Angle Meter](https://marlvel.ai/intel-report/utilities/angle-meter)** by nakhon phagdeechat: While broader in scope, this tool is used by technicians for physical measurements often required during HVAC ductwork installation. - 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. ### New Kids on the Block (What's Innovative) - **[Beam Calculator.](https://marlvel.ai/intel-report/utilities/beam-calculator-1)** by Sachinbhai Surani: This newcomer provides structural analysis tools that overlap with the technical calculation needs of HVAC and building systems engineers. - Allows users to save and load complex beam configurations, significantly improving workflow efficiency for structural analysis. - **[MKS Beton](https://marlvel.ai/intel-report/business/com-mksbetongroup-mymksbeton)** by MKS BETON LLC: This app enters the utility space with a focus on material calculations, competing for the attention of construction-related tradespeople. - Features a bilingual interface that significantly lowers the barrier to entry for diverse construction workforces. ## What's New - **Latest (v1.37.13, 5 years ago):** General bug fixes. ## App Momentum (Zombie) {#momentum} - No feature updates since May 2021. - Maintains static free-utility model. > **Cadence:** 1 total versions · 0 majors in last 6 months · 1855 days since last update ## The "So What?" (Strategic Takeaway) {#so-what} HVAC Formulas Tech Calculator is an established utilities app that is completely free. With a 3.79/5 rating from 14 reviews, it shows polarized user reception. > **Bottom Line:** 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. **Best for:** HVAC technicians requiring quick access to industry-specific formulas and calculations while in the field. ### PM Action Plan (Next Best Moves) - [ ] [PIVOT] [HIGH IMPACT] 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: deprioritize Pause the development of new, non-essential formula modules to focus on core technical debt.)_ ### 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) ### Outlook: 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. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Overall Rating | 3.79/5 | | Total Reviews | 14 | | Confidence | Low | | Pricing Model | Free | | Platforms | iOS | | Key Features | 3 analyzed | | Trend | Declining | | Outlook | Declining | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **HVAC Formulas Tech Calculator** (this app) | 3.79/5 | N/A | Sergio Bost | | [MKS Beton](https://marlvel.ai/intel-report/business/com-mksbetongroup-mymksbeton) | N/A/5 | N/A | MKS BETON LLC | | [Angle Meter](https://marlvel.ai/intel-report/utilities/angle-meter) | 2.3/5 | N/A | nakhon phagdeechat | | [Angle Meter PRO](https://marlvel.ai/intel-report/utilities/angle-meter-pro) | 4.2/5 | N/A | nakhon phagdeechat | | [HVAC-calculator](https://marlvel.ai/intel-report/productivity/hvac-calculator) | 4.0/5 | N/A | Trond Rossvoll | | [ResEditor](https://marlvel.ai/intel-report/utilities/reseditor) | 5.0/5 | N/A | Christopher Van Hoose | ## Company Profile - **Developer:** Sergio Bost ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/hvac-formulas-tech-calculator/id1551053530?uo=4) - **Sources:** App store metadata, User reviews. ## Related Intel Reports - [*MKS Beton*](https://marlvel.ai/intel-report/business/com-mksbetongroup-mymksbeton) (MKS BETON LLC) — N/A Rating | N/A Sentiment - [*Angle Meter*](https://marlvel.ai/intel-report/utilities/angle-meter) (nakhon phagdeechat) — 2.3/5 Rating | N/A Sentiment - [*Angle Meter PRO*](https://marlvel.ai/intel-report/utilities/angle-meter-pro) (nakhon phagdeechat) — 4.2/5 Rating | N/A Sentiment - [*HVAC-calculator*](https://marlvel.ai/intel-report/productivity/hvac-calculator) (Trond Rossvoll) — 4.0/5 Rating | N/A Sentiment - [*ResEditor*](https://marlvel.ai/intel-report/utilities/reseditor) (Christopher Van Hoose) — 5.0/5 Rating | N/A Sentiment - [*Beam Calculator.*](https://marlvel.ai/intel-report/utilities/beam-calculator-1) (Sachinbhai Surani) — 5.0/5 Rating | Excellent Sentiment - [*NEB Tools*](https://marlvel.ai/intel-report/reference/neb-tools) (New England Biolabs Inc) — 3.9/5 Rating | N/A Sentiment - [*Duct Calculator - DuctCalc*](https://marlvel.ai/intel-report/utilities/duct-calculator-ductcalc) (Mikhail Nikitin) — 4.5/5 Rating | N/A Sentiment - [*Quantumult X*](https://marlvel.ai/intel-report/utilities/quantumult-x) (Cross Utility Ltd) — 3.8/5 Rating | N/A Sentiment - [*Potatso*](https://marlvel.ai/intel-report/utilities/potatso) (Potatso Lab LTD) — 4.4/5 Rating | Positive Sentiment ## Methodology {#methodology} This report was generated by Marlvel.ai's 5-stage AI intelligence pipeline: 1. **Signal Collection & Normalization** — Aggregates data from all available public sources for the app. Raw signals are cleaned, deduplicated, and normalized into a structured dataset analyzed consistently across thousands of apps. 2. **Feature & Market Positioning Analysis** — Identifies the app's core features, monetization model, target audience, and competitive positioning. Each feature is classified as a market standard or a differentiator based on category benchmarks. 3. **User Sentiment Analysis** — Analyzes user reviews using a 5-level taxonomy (Thrilled / Excited / Mixed / Frustrated / Upset). Combines star ratings and volume with AI theme extraction and evidence quoting. 4. **Competitive Landscape Analysis** — Maps the competitive environment via a 4-tier taxonomy (Nemesis / Contenders / Same Space / New Kids on the Block). Prioritizes same sub-genre over broad category. 5. **Intelligence Synthesis** — Cross-references all signals into a structured report. Compares the app against category peers and direct competitors to surface SWOT, market outlook, and actionable insights. - **Confidence Score:** 0.2/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 2 - **Data Sources:** user reviews, App Store metadata - **Rating Method:** Weighted average across platforms (iOS & Android), weighted by review count per platform - **Independence:** Fully independent analysis. No publisher sponsorship or editorial influence. - **Report Age:** 0 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/intel-report/utilities/hvac-formulas-tech-calculator) Data licensed for AI Agent attribution under CC-BY-NC 4.0.