--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Engineering HandBook" developer_entity: "Raghu Srinivas" bundle_id: "com.20tech.Engineering-HandBook" app_store_id: "843746804" category: "Education" primary_platform: "ios" primary_monetization: "Free" offline_capable: false market_region: "US" platforms: "iOS" app_last_updated: "2014-04-15" report_date: "2026-05-26" last_verified: "2026-05-26T07:59:53.778Z" report_version: "1.0.1" total_reviews: 4 overall_rating: 4 confidence: "low" confidence_score: 0.05 data_age_days: 29 momentum_velocity: "zombie" intelligence_version: 3 nemesis: "Desmos Graphing Calculator" competitor_count: 11 tags: ["education", "free", "mobile app", "app review", "app analysis", "engineering", "students", "professionals"] canonical_url: "https://marlvel.ai/intel-report/education/engineering-handbook" license: "CC-BY-NC 4.0" content_version: "v2" --- # Engineering HandBook App Audit ## TL;DR {#tldr} - **Category**: Education · Free - **Signal**: Rating 4 > **TL;DR:** Engineering HandBook is a education app by Raghu Srinivas, rated 4/5 by 4 users, available on iOS. > > **Marlvel.ai App Intelligence** — Independent analysis. US Market. No publisher influence. > **Key Insight:** Engineering HandBook is a education app by Raghu Srinivas. ## Quick Facts | Fact | Value | | :--- | :--- | | **Rating** | 4/5 (4 reviews) | | **Category** | Education | | **Developer** | Raghu Srinivas | | **Pricing** | Free | | **Platforms** | iOS | | **Confidence** | Low (0.05/1.0) | | **Data Age** | 0d | ## Metadata & Market Performance - **Publisher:** Raghu Srinivas - **Category:** Education - **Target Audience:** Engineering students and professionals requiring quick access to reference data and calculation tools while on site. - **Platforms:** iOS - **Version Audited:** 1.0.1 - **Audit Date:** 2026-05-26 - **Signal Count:** 4 reviews analyzed - **Confidence:** Low (0.05/1.0) - **App Store ID (iOS):** 843746804 - **Bundle ID:** com.20tech.Engineering-HandBook - **Performance Trend:** Stable - **Data Window:** Analysis based on signals collected up to 2026-05-26 ## Executive Snapshot **What it is:** Engineering HandBook is a mobile reference tool for engineering formulas, material properties, and unit conversions on iOS. **Why users hire it:** Users hire this app for quick, offline access to technical data while on worksites, reducing the friction of manual lookup. ## App DNA (Features & Intent) - **[Standard] Engineering Formulas:** Access to formulas for mechanics, gear drives, and metal cutting operations. - **[Standard] Unit Conversion:** Calculators for inch to millimeter conversion and physical quantity units. - **[Standard] Material Classification:** Reference database for ferrous metals, non-ferrous metals, and plastics properties. * *User Intent:* Users seek enhanced value through premium features. - **[Differentiator] Indian Standards Calculation:** Calculation of equal and unequal angles based on specific Indian Standards. ## Market Position {#market-position} The app maintains a 4.0 rating on iOS, but the lack of updates since 2014 and a total of 4 ratings signal a dormant product state. ## Monetization Strategy - **Model:** Free - **Tiers:** Free - **Analysis:** The app is distributed as a free utility with no visible monetization. ## SWOT Analysis {#swot} **Core Strengths:** - Indian Standards calculation logic provides a niche B2B distribution barrier into regional engineering workflows. **Critical Frictions:** - Zero updates since 2014 creates a perception of abandonment. - 4-review total count indicates negligible market penetration. **Growth Levers:** - Integration of modern, interactive calculation engines could pivot the app from a static reference to an active engineering tool. **Market Threats:** - High-frequency update cadences from competitors like Desmos and ClassWiz render static reference apps obsolete for power users. ## Recent Changes (v2 → v3) {#recent-changes} The competitive landscape was significantly expanded to include a broader range of math and engineering utilities, while SWOT and PM action items were refined to emphasize the product's dated interface and lack of market penetration. **Overall trend**: Stable **Compared at**: 2026-05-26 ### High-impact changes - **[Shifted] Competitive Landscape Overhaul** (positioning) — Replaced AI-homework solver competitors with general-purpose math and engineering calculator apps like Desmos and ClassWiz. ### Medium-impact changes - **[Added] Market Penetration Weakness** (swot) — Added specific weakness regarding the 4-review total count indicating negligible market penetration. - **[Shifted] Threat Landscape Update** (swot) — Threats shifted from generic AI-homework solvers to specific high-frequency update cadences from competitors like Desmos and ClassWiz. - **[Improved] PM Action Item Reasoning** (positioning) — Updated reasoning to explicitly link the 2014-era interface to professional worksite usability friction. ## Rivals Landscape {#rivals} > Competitive positioning identified by AI analysis of app features, category, and market signals. ### Engineering HandBook vs Desmos Graphing Calculator — Head to Head - **[Desmos Graphing Calculator](https://marlvel.ai/intel-report/education/desmos-graphing-calculator)** by Desmos: Desmos dominates the education landscape by providing a high-performance, interactive math engine that serves as the gold standard for students and engineers alike. - **Key differences:** - Advanced interactive sliders allow users to visualize dynamic changes in mathematical functions in real-time. - Comprehensive accessibility suite ensures compliance and usability for students with visual or motor impairments. - Massive user base and brand recognition create a powerful network effect within academic institutions. - **Where Engineering HandBook wins:** - ✅ Provides specialized engineering-focused content like metal cutting and material properties not found in general calculators. - ✅ Offers a portable, field-ready reference for professional engineers rather than just academic graphing tools. - **Where Desmos Graphing Calculator wins:** - ❌ Superior math engine performance handles complex graphing and calculus tasks with significantly higher precision. - ❌ Frequent updates and massive scale ensure long-term stability and feature innovation that outpaces niche tools. - **Verdict:** The target app should pivot toward professional engineering workflows to avoid direct feature competition with Desmos's academic dominance. ### Contenders (Strong Challengers) - **[ClassWiz Calc App QR](https://marlvel.ai/intel-report/education/classwiz-calc-app-qr)** by CASIO COMPUTER CO., LTD.: Casio leverages its hardware reputation to bridge physical classroom tools with digital mobile interfaces, competing for the same technical audience. - QR connectivity allows seamless data transfer between physical Casio hardware and the mobile application interface. - Scientific calculation engine provides professional-grade accuracy that mirrors standard industry-approved physical scientific calculators. - **[Area and Volume Calculator](https://marlvel.ai/intel-report/education/area-and-volume-calculator)** by Anas Abubakar: This app directly challenges the Engineering HandBook's utility in geometry and physical measurement calculations. - Dedicated 3D shape calculator provides specialized volume metrics that the target app lacks in depth. - Includes a built-in Pythagorean calculator for rapid field measurements, streamlining common construction and engineering tasks. - **[Fractions Calculator](https://marlvel.ai/intel-report/education/fractions-calculator-2)** by Corporate Smalltalk Consulting Ltd: It targets users needing quick, reliable arithmetic tools, overlapping with the basic calculation features of the Engineering HandBook. - Includes a paper tape history feature allowing users to audit and review previous calculation steps. - Supports flexible output formats that cater to specific engineering or academic notation requirements. - **[Fraction Simplifier](https://marlvel.ai/intel-report/education/fraction-simplifier)** by Glindemann, Sennoun, Langer GbR: This app competes for the same student demographic by offering specialized, step-by-step solutions for specific arithmetic pain points. - Provides granular step-by-step solutions that help students understand the logic behind complex fraction arithmetic. - Integrates curated learning videos to provide contextual support beyond simple numerical calculation outputs. ### Peers (What They Do Better) - **[Funny Math Education](https://marlvel.ai/intel-report/education/funny-math-education)** by Nikita Chizhov: Provides a broad suite of arithmetic and statistical tools that overlap with the target app's basic calculation features. - Includes a library of mathematical tricks that provide users with shortcuts for common arithmetic operations. - Offers integrated statistical analysis tools that provide more depth than standard basic calculator applications. - **[Stick and Split](https://marlvel.ai/intel-report/education/com-sunflowerlearning-tt)** by NumberClub: Targets the same educational space by providing visual aids for core multiplication and division concepts. - Utilizes unique visual representations to help users grasp the conceptual mechanics of multiplication and division. - Supports multi-user account management, making it highly effective for classroom or family-shared device environments. - **[Calcugators - Addition](https://marlvel.ai/intel-report/education/calcugators-addition)** by Little 10 Robot: Focuses on early-stage math education, competing for the attention of users seeking structured learning paths. - Employs strategy-based learning paths that move beyond rote memorization to build deeper mathematical intuition. - Privacy-focused design architecture appeals to parents and educators concerned about student data collection. - **[CountItBack](https://marlvel.ai/intel-report/education/countitback)** by Doug Hicks: Shares the education category by focusing on mental math and arithmetic proficiency through gamified mechanics. - Uses competitive leaderboards to drive user engagement through timed mental math challenges and social pressure. - Features a dedicated 'Hard Mode' that specifically targets advanced users looking to improve calculation speed. ### New Kids on the Block (What's Innovative) - **[Ensemble Math](https://marlvel.ai/intel-report/education/ensemble-math)** by Ensemble Education: A recent arrival that uses gamified exploration to teach math, competing for the same educational market share. - Interactive world map provides a narrative-driven learning experience that increases long-term user retention and engagement. - **[Long Addition and Subtraction](https://marlvel.ai/intel-report/education/long-addition-and-subtraction)** by OCD Inc.: A new entrant focusing on the foundational mechanics of arithmetic, competing for the same entry-level educational audience. - Distraction-free interface specifically designed to keep students focused on column-based solving without unnecessary UI clutter. ## What's New - **Latest (v1.0.1, 12 years ago):** Fixed a bug in the Selection dialog. ## App Momentum (Zombie) {#momentum} - No updates since 2014 release. > **Cadence:** 1 total versions · 0 majors in last 6 months · 4424 days since last update ## The "So What?" (Strategic Takeaway) {#so-what} Engineering HandBook is an established education app that is completely free. With a 4/5 rating from 4 reviews, it shows polarized user reception. > **Bottom Line:** The app provides niche value through Indian Standards calculations but suffers from a decade of neglect, so the PM should pivot to a modern interface or sunset the product to avoid brand dilution. **Best for:** Engineering students and professionals requiring quick access to reference data and calculation tools while on site. ### PM Action Plan (Next Best Moves) - [ ] [PIVOT] [HIGH IMPACT] Pivot to a modern UI framework because the 2014-era interface lacks the fluidity required for professional worksite use → increase retention. — *The app has not been updated since 2014, making it functionally and visually obsolete compared to current competitors.* _(trade-off: deprioritize Deprioritize new content additions until the core interface is brought to modern standards.)_ ### Feature Gaps vs Competitors - Interactive graphing (available in Desmos) - QR hardware connectivity (available in ClassWiz) - 3D volume metrics (available in Area and Volume Calculator) ### Outlook: Declining The engineering reference market is consolidating around interactive, high-frequency update models that provide more than just static data. Without a major technical refresh, this app will continue to lose relevance to competitors that integrate with modern engineering workflows. - 🔴 The lack of updates since 2014 prevents the app from surfacing in store algorithms, leading to stagnant discovery and user acquisition. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Overall Rating | 4/5 | | Total Reviews | 4 | | Confidence | Low | | Pricing Model | Free | | Platforms | iOS | | Key Features | 4 analyzed | | Trend | Stable | | Outlook | Declining | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Engineering HandBook** (this app) | 4/5 | N/A | Raghu Srinivas | | [Stick and Split](https://marlvel.ai/intel-report/education/com-sunflowerlearning-tt) | 4.8/5 | Thrilled | NumberClub | | [Desmos Graphing Calculator](https://marlvel.ai/intel-report/education/desmos-graphing-calculator) | 4.5/5 | Thrilled | Desmos | | [Calcugators - Addition](https://marlvel.ai/intel-report/education/calcugators-addition) | 4.7/5 | N/A | Little 10 Robot | | [Ensemble Math](https://marlvel.ai/intel-report/education/ensemble-math) | N/A/5 | N/A | Ensemble Education | | [ClassWiz Calc App QR](https://marlvel.ai/intel-report/education/classwiz-calc-app-qr) | 2.1/5 | N/A | CASIO COMPUTER CO., LTD. | ## Company Profile - **Developer:** Raghu Srinivas ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/engineering-handbook/id843746804?uo=4) - **Sources:** App store metadata. ## Related Intel Reports - [*Stick and Split*](https://marlvel.ai/intel-report/education/com-sunflowerlearning-tt) (NumberClub) — 4.8/5 Rating | Excellent Sentiment - [*Desmos Graphing Calculator*](https://marlvel.ai/intel-report/education/desmos-graphing-calculator) (Desmos) — 4.5/5 Rating | Excellent Sentiment - [*Calcugators - Addition*](https://marlvel.ai/intel-report/education/calcugators-addition) (Little 10 Robot) — 4.7/5 Rating | N/A Sentiment - [*Ensemble Math*](https://marlvel.ai/intel-report/education/ensemble-math) (Ensemble Education) — N/A Rating | N/A Sentiment - [*ClassWiz Calc App QR*](https://marlvel.ai/intel-report/education/classwiz-calc-app-qr) (CASIO COMPUTER CO., LTD.) — 2.1/5 Rating | N/A Sentiment - [*Funny Math Education*](https://marlvel.ai/intel-report/education/funny-math-education) (Nikita Chizhov) — 5.0/5 Rating | N/A Sentiment - [*Fractions Calculator*](https://marlvel.ai/intel-report/education/fractions-calculator-2) (Corporate Smalltalk Consulting Ltd) — 4.5/5 Rating | N/A Sentiment - [*Long Addition and Subtraction*](https://marlvel.ai/intel-report/education/long-addition-and-subtraction) (OCD Inc.) — N/A Rating | N/A Sentiment - [*Fraction Simplifier*](https://marlvel.ai/intel-report/education/fraction-simplifier) (Glindemann, Sennoun, Langer GbR) — 4.5/5 Rating | N/A Sentiment - [*CountItBack*](https://marlvel.ai/intel-report/education/countitback) (Doug Hicks) — 1.0/5 Rating | N/A 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:** 4 - **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/education/engineering-handbook) Data licensed for AI Agent attribution under CC-BY-NC 4.0.