--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Ductulator" developer_entity: "Simon Leroux" bundle_id: "com.mbeconcept.ductulator" app_store_id: "1528030964" category: "Productivity" primary_platform: "ios" primary_monetization: "Free" offline_capable: false market_region: "US" platforms: "iOS" app_last_updated: "2024-02-06" report_date: "2026-10-25" last_verified: "2026-10-25T00:00:00.000Z" report_version: "1.5" total_reviews: 2 overall_rating: 1 sentiment: "Upset" sentiment_score: 10 confidence: "medium" confidence_score: 0.45 top_complaint_theme: "The app lacks the English language support that users expect based on the store description" review_sample_size: 2 total_review_count: 2 analyzed_review_count: 2 data_age_days: 20 momentum_velocity: "zombie" intelligence_version: 2 tags: ["productivity", "free", "upset sentiment", "mobile app", "app review", "app analysis", "engineers,", "architects,", "ventilation"] canonical_url: "https://marlvel.ai/apps/ductulator" license: "CC-BY-NC 4.0" content_version: "v2" --- # Ductulator Intelligence Report ## TL;DR {#tldr} - **Category**: Productivity · Free - **Signal**: Rating 1 · Sentiment Upset - **Recent focus**: The app lacks the English language support that users expect based on the store description (top complaint) > **TL;DR:** Ductulator is a productivity app by Simon Leroux, rated 1/5 by 2 users, with Upset user sentiment (10/100), available on iOS. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** Ductulator faces Upset user sentiment (1/5 from 2 reviews), with users reporting the app lacks the english language support that users expect based on the store description as the primary concern. ## Quick Facts | Fact | Value | | :--- | :--- | | **Rating** | 1/5 (2 reviews) | | **User Mood** | Upset | | **Category** | Productivity | | **Developer** | Simon Leroux | | **Pricing** | Free | | **Platforms** | iOS | | **Confidence** | Medium (0.45/1.0) | | **Data Age** | 20d | ## Metadata & Market Performance - **Publisher:** Simon Leroux - **Category:** Productivity - **Target Audience:** Engineers, architects, and ventilation contractors requiring quick field calculations for HVAC projects. - **Platforms:** iOS - **Version Reviewed:** 1.5 - **Report Date:** 2026-10-25 - **Signal Count:** 2 reviews analyzed - **Confidence:** Medium (0.45/1.0) - **App Store ID (iOS):** 1528030964 - **Bundle ID:** com.mbeconcept.ductulator - **Data Window:** Analysis based on signals collected up to 2026-10-25 ## Executive Snapshot **What it is:** Ductulator is a specialized HVAC calculation utility for engineers and contractors on iOS. **Why users hire it:** The app removes the friction of manual duct dimensioning in the field, acting as a direct lead-generation channel for the developer's industrial design business. ## App DNA (Features & Intent) - **[Standard] Square Duct Calculation:** Calculates dimensions for square ventilation ducts based on user input. Revenue link: B2B / partnership — serves as a utility tool to drive brand awareness for MBe Concept's industrial design services. - **[Standard] Round Duct Equivalence:** Converts square duct dimensions to equivalent round diameter. Revenue link: B2B / partnership — provides technical utility for engineers and contractors, reinforcing the developer's authority in ventilation design. * *User Intent:* Users seek enhanced value through premium features. - **[Standard] Metric Conversion:** Provides metric equivalents for duct dimensions. Revenue link: B2B / partnership — reduces friction for professional users on international or mixed-unit projects. * *User Intent:* Users seek enhanced value through premium features. - **[Differentiator] Volume Ratio Adjustment:** Converts square duct dimensions based on a specific volume ratio. Revenue link: B2B / partnership — specialized calculation tool for HVAC professionals that acts as a lead-generation hook for the developer's consulting services. * *User Intent:* Users seek enhanced value through premium features. ## Market Position {#market-position} Ductulator occupies a niche utility space for HVAC professionals, but its 1.0-star rating across 2 reviews highlights a failure to meet basic accessibility expectations. The lack of English support effectively gates the app from the broader international engineering market. ## Monetization Strategy - **Model:** Free - **Tiers:** Free - **Analysis:** The app is provided as a free utility to support the developer's primary industrial design and 3D scanning business. ## 🔴 User Sentiment (Medium Confidence: 2 of 2 reviews analyzed) {#user-sentiment} - **Overall Rating:** 1/5 - **Platform Split:** iOS 1.0/5 (2 ratings) - **Overall Sentiment:** Upset ### Top Complaints (Impact Areas) - **The app lacks the English language support that users expect based on the store description** ## SWOT Analysis {#swot} **Core Strengths:** - Specialized volume-ratio calculation tool serves as a high-intent lead generation hook for industrial design consulting **Growth Levers:** - Localized English interface would immediately resolve the primary driver of negative sentiment and expand the addressable market ## What's New - **Latest (v1.5, 2 years ago):** Updated the application to include a privacy policy. ## App Momentum (Zombie) {#momentum} - Quiet 33 months, privacy update only. - No feature expansion since initial release. > **Cadence:** 1 total versions · 0 majors in last 6 months · 992 days since last update ## The "So What?" (Strategic Takeaway) {#so-what} Ductulator is a productivity app that is completely free. It holds a 1/5 rating from 2 reviews. > **Bottom Line:** Ductulator functions as a B2B utility, but the persistent absence of English support invalidates its value for a broad professional audience. Prioritizing localization would resolve the primary churn driver and unlock the app's potential as a consistent lead-generation channel for MBe Concept. **Best for:** Engineers, architects, and ventilation contractors requiring quick field calculations for HVAC projects. ### PM Action Plan (Next Best Moves) - [ ] [INVEST] Ship English localization because the current language-lock is the #1 driver of negative sentiment → increase user accessibility and rating baseline ### Outlook: Stable Professional HVAC utility demand remains steady, but Ductulator is currently failing to capture this market due to language barriers. The app's current maintenance-only cadence suggests it will continue to lose relevance unless the developer pivots to address basic accessibility. - 🔴 The lack of English localization remains unaddressed despite a recent privacy-focused update, signaling a disconnect between developer priorities and user needs. - 🔴 The 33-month release gap suggests the app is in maintenance mode, which limits its ability to capture new professional users who prioritize active tool support. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Overall Rating | 1/5 | | Total Reviews | 2 | | Sentiment | Upset (10/100) | | Confidence | Medium | | Pricing Model | Free | | Platforms | iOS | | Key Features | 4 analyzed | | Outlook | Stable | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Ductulator** (this app) | 1/5 | Upset | Simon Leroux | | [HitWave](https://marlvel.ai/apps/ciendor-applications-hitwave) | 2.5/5 | Mixed | Ciendor Holdings Corp. LTD | | [ChatGPT](https://marlvel.ai/apps/chatgpt) | 4.8/5 | n/a | OpenAI OpCo, LLC | | [VPN 360: Fast & Secure Proxy](https://marlvel.ai/apps/co-infinitysoft-vpn360) | 4.5/5 | Mixed | Pango GmbH | | [VPN - Super Unlimited Proxy](https://marlvel.ai/apps/vpn-super-unlimited-proxy) | 4.7/5 | Thrilled | Mobile Jump Pte Ltd | | [Bookmarks - Send To Self](https://marlvel.ai/apps/bookmarks-send-to-self) | 4.4/5 | Excited | GILI | ## Company Profile - **Developer:** Simon Leroux - **Website:** [https://mbeconcept.ca/](https://mbeconcept.ca/) - **Social:** [Instagram](https://instagram.com/mbeconcept) · [Facebook](https://facebook.com/mbeconcept) · [X/Twitter](https://twitter.com/ConceptMbe) · [YouTube](https://www.youtube.com/watch) · [LinkedIn](https://www.linkedin.com/company/mbe-concept) ## Data Sources & Links - **App Store ID:** 1528030964 - **Dev Site:** [Official Website](https://mbeconcept.ca/) - **Sources:** Developer website content, App store metadata, User reviews. ## Related Intel Reports - [*HitWave*](https://marlvel.ai/apps/ciendor-applications-hitwave) (Ciendor Holdings Corp. LTD) · 2.5/5 Rating - [*ChatGPT*](https://marlvel.ai/apps/chatgpt) (OpenAI OpCo, LLC) · 4.8/5 Rating - [*VPN 360: Fast & Secure Proxy*](https://marlvel.ai/apps/co-infinitysoft-vpn360) (Pango GmbH) · 4.5/5 Rating - [*VPN - Super Unlimited Proxy*](https://marlvel.ai/apps/vpn-super-unlimited-proxy) (Mobile Jump Pte Ltd) · 4.7/5 Rating | Excellent Sentiment - [*Bookmarks - Send To Self*](https://marlvel.ai/apps/bookmarks-send-to-self) (GILI) · 4.4/5 Rating | Positive Sentiment - [*Clean Swell*](https://marlvel.ai/apps/clean-swell) (Ocean Conservancy) · 3.9/5 Rating - [*Data Tree Manager*](https://marlvel.ai/apps/data-tree-manager) (Vsevolod Migdisov) · N/A Rating - [*DoughLab - Baking Recipe Lab*](https://marlvel.ai/apps/doughlab-baking-recipe-lab) (Jeong-soo Park) · N/A Rating - [*Google Gemini*](https://marlvel.ai/apps/google-gemini-1) (Google LLC) · 4.6/5 Rating | Positive Sentiment - [*Infomaniak Euria*](https://marlvel.ai/apps/infomaniak-euria) (Infomaniak Network SA) · 4.8/5 Rating ## Frequently Asked Questions {#faq} ### Is Ductulator available in English? No, Ductulator currently does not provide an English language option, which is a primary source of frustration for users expecting support based on the store description. ### Is Ductulator suitable for professional HVAC engineers? While the app offers specialized calculation tools for square and round ducts, the lack of English support makes it difficult for many professionals to use effectively in the field. ### Is Ductulator free to use? Yes, Ductulator is provided as a free utility to support the developer's primary industrial design and consulting business. ## 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 into synthesised themes (no verbatim quotes). 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:** 0.45/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 2 - **Data Sources:** user reviews, developer website, 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:** 20 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/ductulator) Data licensed for AI Agent attribution under CC-BY-NC 4.0.