--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Duct Calculator - DuctCalc" developer_entity: "Mikhail Nikitin" bundle_id: "com.ductcalc.app" app_store_id: "6757307937" category: "Utilities" primary_platform: "ios" primary_monetization: "Free" offline_capable: false market_region: "US" platforms: "iOS" app_last_updated: "2026-01-08" report_date: "2026-06-18" last_verified: "2026-06-18T23:31:56.291Z" report_version: "1.0" total_reviews: 23 overall_rating: 4.48 confidence: "low" confidence_score: 0.05 data_age_days: 13 momentum_velocity: "zombie" intelligence_version: 3 nemesis: "HVAC-calculator" competitor_count: 7 tags: ["utilities", "free", "mobile app", "app review", "app analysis", "engineers,", "mechanical", "contractors,"] canonical_url: "https://marlvel.ai/intel-report/utilities/duct-calculator-ductcalc" license: "CC-BY-NC 4.0" content_version: "v2" --- # Duct Calculator - DuctCalc App Audit ## TL;DR {#tldr} - **Category**: Utilities · Free - **Signal**: Rating 4.48 > **TL;DR:** Duct Calculator - DuctCalc is a utilities app by Mikhail Nikitin, rated 4.48/5 by 23 users, available on iOS. > > **Marlvel.ai App Intelligence** — Independent analysis. US Market. No publisher influence. > **Key Insight:** Duct Calculator - DuctCalc is a utilities app by Mikhail Nikitin. ## Quick Facts | Fact | Value | | :--- | :--- | | **Rating** | 4.48/5 (23 reviews) | | **Category** | Utilities | | **Developer** | Mikhail Nikitin | | **Pricing** | Free | | **Platforms** | iOS | | **Confidence** | Low (0.05/1.0) | | **Data Age** | 0d | ## Metadata & Market Performance - **Publisher:** Mikhail Nikitin - **Category:** Utilities - **Target Audience:** HVAC engineers, mechanical contractors, and MEP design professionals requiring on-site duct sizing and air property calculations. - **Platforms:** iOS - **Version Audited:** 1.0 - **Audit Date:** 2026-06-18 - **Signal Count:** 2 reviews analyzed - **Confidence:** Low (0.05/1.0) - **App Store ID (iOS):** 6757307937 - **Bundle ID:** com.ductcalc.app - **Performance Trend:** Mixed - **Data Window:** Analysis based on signals collected up to 2026-06-18 ## Executive Snapshot **What it is:** DuctCalc is an HVAC utility app for iOS providing duct sizing and psychrometric calculations for engineers and contractors. **Why users hire it:** Users hire the app to consolidate two essential HVAC workflows into one interface, removing the need to switch between separate tools during on-site design tasks. ## App DNA (Features & Intent) - **[Differentiator] Dual-Function HVAC Calculator:** Combines duct sizing and psychrometric analysis in one interface, removing the need to switch between separate tools. - **[Standard] Duct Sizing Calculator:** Calculates round, rectangular, and flexible ductwork dimensions using ASHRAE-compliant formulas with forward and reverse modes. - **[Differentiator] Psychrometric Analysis:** Analyzes humid air properties including enthalpy, specific volume, and saturation pressure with interactive chart visualization. * *User Intent:* Users seek enhanced value through premium features. ## Market Position {#market-position} DuctCalc operates as a specialized utility in the HVAC engineering space, competing against legacy calculators by offering a modern interface. The absence of monetization signals a focus on user acquisition over immediate revenue generation. ## Monetization Strategy - **Model:** Free - **Tiers:** Free version with full feature access - **Analysis:** The app is currently offered as a free utility with no visible subscription or IAP gates. ## SWOT Analysis {#swot} **Core Strengths:** - Dual-function interface replaces multiple tools, reducing workflow friction for field technicians. **Critical Frictions:** - No cloud-save or data-export functionality for professional reporting. - Free-only model lacks a clear revenue path. **Growth Levers:** - Integration of advanced system-efficiency metrics could capture the power-user segment. **Market Threats:** - Stagnant feature development compared to the nemesis's specialized engineering metrics. ## Recent Changes (v2 → v3) {#recent-changes} The report shifts from addressing user-reported monetization friction to identifying professional-grade feature gaps and competitive parity risks. **Overall trend**: Mixed **Compared at**: 2026-06-18 ### High-impact changes - **[Removed] User Sentiment Data Unavailable** (sentiment) — User sentiment, rating, and review-based complaint data are no longer provided, preventing tracking of the previously reported deceptive subscription issues. - **[Shifted] SWOT Focus: Monetization to Utility** (swot) — Weaknesses shifted from 'Deceptive subscription practices' to 'No cloud-save or data-export functionality', reflecting a pivot toward professional utility. - **[Added] Competitive Nemesis Identified** (positioning) — Added 'HVAC-calculator' as a direct nemesis, highlighting a gap in SFP and heat recovery efficiency metrics. ### Medium-impact changes - **[Added] Professional Feature Gaps** (features) — Added 'Data export for professional reporting' and 'SFP/heat recovery efficiency' to the feature gaps list. ## Rivals Landscape {#rivals} > Competitive positioning identified by AI analysis of app features, category, and market signals. ### Duct Calculator - DuctCalc vs HVAC-calculator — Head to Head - **[HVAC-calculator](https://marlvel.ai/intel-report/productivity/hvac-calculator)** by Trond Rossvoll: This app directly targets the same professional HVAC engineering audience by providing specialized technical calculations for ductwork and system efficiency. - **Key differences:** - Includes specialized SFP and heat recovery efficiency calculations missing from our current core feature set. - Focuses on broader mechanical system performance metrics rather than just physical duct sizing and psychrometrics. - **Where Duct Calculator - DuctCalc wins:** - ✅ Modern UI/UX design provides a significantly better user experience than the dated 2015-era interface. - ✅ Higher frequency of updates ensures compatibility with current iOS versions and modern hardware standards. - **Where HVAC-calculator wins:** - ❌ Established niche authority in HVAC system efficiency calculations beyond basic duct sizing dimensions. - ❌ Provides specialized engineering metrics that cater to advanced system design workflows. - **Verdict:** The nemesis is stagnant; we should aggressively capture its user base by implementing its unique efficiency calculations into our modern, updated interface. ### Peers (What They Do Better) - **[Tire Pressure Calculator](https://marlvel.ai/intel-report/utilities/tire-pressure-calculator)** by Titan International, Inc.: This app competes for the same 'specialized calculator' utility category, demonstrating high user engagement through terrain-specific optimization features. - Offers terrain-specific optimization modes that provide tailored results based on complex environmental variables. - Maintains a high volume of user reviews, indicating strong market penetration and trust in its calculation accuracy. - **[Angle Meter PRO](https://marlvel.ai/intel-report/utilities/angle-meter-pro)** by nakhon phagdeechat: This is a professional-grade measurement tool that competes for the attention of field professionals who require reliable, high-precision calculation utilities. - Includes advanced data documentation features allowing users to save and export measurement results for reports. - Provides camera-based measurement capabilities that offer a more intuitive workflow for on-site field measurements. - **[ResEditor](https://marlvel.ai/intel-report/utilities/reseditor)** by Christopher Van Hoose: This app serves the same professional utility market by providing technical calculators for bandwidth and resolution, mirroring our focus on precision tools. - Features a highly specialized IP and bandwidth calculator suite for network and systems engineers. - Maintains a high-quality, modern interface that appeals to the same professional demographic as our app. - **[Angle Meter](https://marlvel.ai/intel-report/utilities/angle-meter)** by nakhon phagdeechat: While focused on measurement, this app competes for the same 'utility tool' screen real estate used by contractors and field technicians. - Utilizes camera integration for real-time physical environment analysis which our app currently lacks. - Offers dual measurement modes that provide versatility for general construction tasks beyond HVAC-specific sizing. ### 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 our engineering user base. - Supports complex structural analysis and influence line computation, appealing to engineers needing more than basic sizing. - **[MKS Beton](https://marlvel.ai/intel-report/business/com-mksbetongroup-mymksbeton)** by MKS BETON LLC: A new entrant in the construction utility space that combines material calculation with commercial inquiry systems. - Integrates a commercial inquiry system directly into the calculator to bridge the gap between estimation and procurement. ## App Momentum (Zombie) {#momentum} - Released initial version in Jan 2026. - Maintains steady utility-focused feature set. > **Cadence:** 1 total versions · 0 majors in last 6 months · 161 days since last update ## The "So What?" (Strategic Takeaway) {#so-what} Duct Calculator - DuctCalc is an established utilities app that is completely free. With a 4.48/5 rating from 23 reviews, it shows polarized user reception. > **Bottom Line:** DuctCalc succeeds by consolidating essential HVAC tools into a modern interface, but it lacks the professional reporting and advanced efficiency metrics needed to retain power users, so the PM should prioritize data-export features to secure professional adoption. **Best for:** HVAC engineers, mechanical contractors, and MEP design professionals requiring on-site duct sizing and air property calculations. ### PM Action Plan (Next Best Moves) - [ ] [INVEST] [HIGH IMPACT] Ship data-export features because professional MEP firms require documentation for reporting → increase professional-tier adoption. — *Professional users require documentation for reporting, which is currently missing.* _(trade-off: deprioritize Pause the psychrometric chart UI refresh — data export has higher professional-user impact.)_ - [ ] [PIVOT] [HIGH IMPACT] Pivot to a freemium model because the current free-only strategy lacks a sustainable revenue path → capture long-term development capital. — *The current free-only model provides no clear path to sustain long-term development.* _(trade-off: deprioritize Deprioritize new duct material support — monetization is critical for app survival.)_ - [ ] [MAINTAIN] [MEDIUM IMPACT] Audit nemesis feature set because missing efficiency metrics are the primary churn risk for engineering users → maintain competitive parity. — *The nemesis includes efficiency metrics that our app currently lacks.* _(trade-off: deprioritize Same-quarter capacity available — no major lever displaced.)_ ### Feature Gaps vs Competitors - SFP and heat recovery efficiency calculations (available in HVAC-calculator but absent here) - Data export for professional reporting (available in Angle Meter PRO but absent here) ### Outlook: Stable The HVAC utility market is shifting toward integrated workflows that support documentation and reporting. DuctCalc is currently positioned as a basic utility, which leaves it vulnerable to competitors that offer more advanced engineering metrics and reporting capabilities. - 🟢 The dual-function interface provides a clear utility advantage over single-purpose calculators, which should drive steady adoption among field technicians. - 🔴 The lack of professional reporting features limits the app's utility for MEP firms, which will likely cap the total addressable market. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Overall Rating | 4.48/5 | | Total Reviews | 23 | | Confidence | Low | | Pricing Model | Free | | Platforms | iOS | | Key Features | 3 analyzed | | Trend | Mixed | | Outlook | Stable | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Duct Calculator - DuctCalc** (this app) | 4.48/5 | N/A | Mikhail Nikitin | | [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:** Mikhail Nikitin ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/duct-calculator-ductcalc/id6757307937?uo=4) - **Sources:** App store metadata. ## 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 - [*Tire Pressure Calculator*](https://marlvel.ai/intel-report/utilities/tire-pressure-calculator) (Titan International, Inc.) — 4.7/5 Rating | Positive 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 - [*Free VPN by Free VPN .org™*](https://marlvel.ai/intel-report/utilities/free-vpn-by-free-vpn-org) (Free VPN LLC) — 4.4/5 Rating | Mixed 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:** 0.05/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 2 - **Data Sources:** 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/duct-calculator-ductcalc) Data licensed for AI Agent attribution under CC-BY-NC 4.0.