--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Haverly's PetroCalc" developer_entity: "Haverly Systems, Inc." bundle_id: "com.haverly.propertycalculator" app_store_id: "1125079839" category: "Utilities" primary_platform: "ios" primary_monetization: "Free" offline_capable: true market_region: "US" platforms: "iOS" app_last_updated: "2026-05-02" report_date: "2026-06-02" last_verified: "2026-06-02T02:02:23.306Z" report_version: "2.1.1" total_reviews: 3 overall_rating: 4.7 sentiment: "Excited" sentiment_score: 80 confidence: "low" confidence_score: 0.55 review_sample_size: 3 data_age_days: 46 momentum_velocity: "maintenance" intelligence_version: 3 nemesis: "Drilling Engineering" competitor_count: 7 tags: ["utilities", "free", "excited sentiment", "mobile app", "app review", "app analysis", "petroleum,", "chemical,", "process"] canonical_url: "https://marlvel.ai/apps/haverly-s-petrocalc" license: "CC-BY-NC 4.0" content_version: "v2" --- # Haverly's PetroCalc App Audit ## TL;DR {#tldr} - **Category**: Utilities Β· Free - **Signal**: Rating 4.67 Β· Sentiment Excited > **TL;DR:** Haverly's PetroCalc is a utilities app by Haverly Systems, Inc., rated 4.67/5 by 3 users, with Excited user sentiment (80/100), available on iOS. > > **Marlvel.ai App Intelligence** β€” Independent analysis. US Market. No publisher influence. > **Key Insight:** Haverly's PetroCalc has Excited user sentiment with a 4.67/5 rating from 3 reviews. ## Quick Facts | Fact | Value | | :--- | :--- | | **Rating** | 4.67/5 (3 reviews) | | **User Mood** | Excited | | **Category** | Utilities | | **Developer** | Haverly Systems, Inc. | | **Pricing** | Free | | **Platforms** | iOS | | **Confidence** | Low (0.55/1.0) | | **Data Age** | 46d | ## Metadata & Market Performance - **Publisher:** Haverly Systems, Inc. - **Category:** Utilities - **Target Audience:** Petroleum, chemical, and process engineers, as well as engineering students requiring field-ready calculation tools. - **Platforms:** iOS - **Version Audited:** 2.1.1 - **Audit Date:** 2026-06-02 - **Signal Count:** 3 reviews analyzed - **Confidence:** Low (0.55/1.0) - **App Store ID (iOS):** 1125079839 - **Bundle ID:** com.haverly.propertycalculator - **Performance Trend:** Mixed - **Data Window:** Analysis based on signals collected up to 2026-06-02 ## Executive Snapshot **What it is:** PetroCalc is a petroleum-property calculation utility for engineers and students, providing offline tools for viscosity, blending, and distillation analysis on iOS. **Why users hire it:** Users hire PetroCalc to perform high-precision engineering calculations in remote field or lab environments where data connectivity is unavailable, ensuring workflow continuity. ## App DNA (Features & Intent) - **[Differentiator] Distillation-Curve Tools:** Converts temperatures between TBP, ASTM D86, D1160, and D2887 scales for distillation analysis - **[Differentiator] Offline Functionality:** Performs all calculations without a data connection, suitable for field and lab environments * *User Intent:* Users want uninterrupted access without internet dependency. - **[Standard] Petroleum Property Calculations:** Calculates viscosity, crude-oil blending, and heating values for engineering tasks * *User Intent:* Users seek enhanced value through premium features. ## Market Position {#market-position} PetroCalc maintains a 4.67-star rating on iOS, though the low review volume of 3 suggests limited market penetration compared to established drilling-specific competitors. ## Monetization Strategy - **Model:** Free - **Tiers:** Free to download and use - **Analysis:** The app is provided as a free utility, functioning as a brand-awareness and lead-generation tool for Haverly Systems' enterprise-grade planning and optimization software. ## 🟒 User Sentiment (Low Confidence: 3 reviews) {#user-sentiment} - **Overall Rating:** 4.67/5 - **Platform Split:** iOS 4.7/5 (3 ratings) - **Overall Sentiment:** Excited ## SWOT Analysis {#swot} **Core Strengths:** - Offline-first engine enables use in remote industrial sites without connectivity - Haverly Systems brand provides high trust for technical calculations - Specialized distillation-curve tools offer precision missing in general-purpose calculators **Critical Frictions:** - Stagnant interface design compared to modern utility benchmarks - Low review volume limits social proof for new users - Lack of safety-critical drilling workflows limits professional adoption **Growth Levers:** - Integrate technical support access for complex scientific queries - Expand into fleet maintenance tracking to increase utility - Develop specialized well control kill sheets for field operations **Market Threats:** - Drilling Engineering's institutional backing provides higher trust for safety-critical operations - Niche entrants like Sludge Dewatering Calculator erode the offline-first utility moat - Lack of feature updates risks obsolescence against agile competitors ## Recent Changes (v2 β†’ v3) {#recent-changes} The report identifies a shift in competitive pressure from general-purpose calculators to specialized, safety-critical engineering utilities, prompting a pivot in product strategy. **Overall trend**: Mixed **Compared at**: 2026-06-02 ### High-impact changes - **[Added] New Competitive Threats** (swot) β€” Added Drilling Engineering as a primary threat and Sludge Dewatering Calculator as an offline-first niche competitor. - **[Shifted] Competitive Focus** (positioning) β€” Shifted focus from general-purpose calculator threats to specialized, workflow-integrated engineering tools. ### Medium-impact changes - **[Added] Safety-Critical Feature Gaps** (features) β€” Identified missing well control kill sheets and stuck pipe identification logic as critical gaps relative to Drilling Engineering. - **[Added] New Weaknesses** (swot) β€” Added lack of safety-critical drilling workflows and stagnant interface design as core product weaknesses. ## Rivals Landscape {#rivals} > Competitive positioning identified by AI analysis of app features, category, and market signals. ### Haverly's PetroCalc vs Drilling Engineering β€” Head to Head - **[Drilling Engineering](https://marlvel.ai/apps/drilling-engineering)** by PT. Pertamina (Persero): This app competes directly for the professional oil and gas engineer's attention by providing specialized field-calculation tools for well control and drilling operations. - **Key differences:** - Provides specialized well control kill sheets that PetroCalc currently lacks for field operations. - Includes stuck pipe identification logic, addressing high-stakes operational risks for drilling engineers. - Leverages institutional backing from a major energy firm, providing high trust for technical calculations. - **Where Haverly's PetroCalc wins:** - βœ… Modern, updated interface compared to the nemesis's stagnant 2017-era design. - βœ… Broader focus on petroleum property calculations rather than just drilling-specific emergency procedures. - **Where Drilling Engineering wins:** - ❌ Deep integration with critical drilling safety workflows like well control and pipe management. - ❌ Higher volume of user reviews suggests a more established footprint in the field engineering community. - **Verdict:** Haverly should emphasize its superior UI and broader property calculation suite to capture users who find the nemesis outdated and overly niche. ### Peers (What They Do Better) - **[EFB-Pro](https://marlvel.ai/apps/efb-pro)** by CAVU Companies: EFB-Pro serves the aviation engineering sector, competing for the same professional demographic that relies on precise, compliant calculation tools. - Provides AFM-compliant performance calculators that meet strict regulatory requirements for aviation professionals. - Includes advanced performance forecasting tools that offer more predictive value than standard property calculators. - **[MyHSRC (Siemens Energy)](https://marlvel.ai/apps/myhsrc-siemens-energy)** by Siemens Energy: This app competes for the industrial maintenance and engineering segment by offering specialized mechanical and lubrication calculators. - Includes fleet maintenance tracking, extending utility beyond simple calculations into operational management. - Backed by Siemens Energy, providing a strong brand-trust signal for industrial maintenance professionals. - **[ResEditor](https://marlvel.ai/apps/reseditor)** by Christopher Van Hoose: This app targets the same 'utility-first' user persona, providing specialized calculators for technical infrastructure and resolution management. - Features a modern, high-performance UI that sets a benchmark for utility app usability. - Includes IP and bandwidth calculators that appeal to the technical professional's broader utility toolkit. - **[NEB Tools](https://marlvel.ai/apps/neb-tools)** by New England Biolabs Inc: While focused on biology, it competes for the same technical professional audience requiring high-precision, reference-based calculation tools. - Offers integrated technical support access directly within the app for complex scientific queries. - Provides specialized enzyme and double digest finders that cater to a highly specific laboratory workflow. ### New Kids on the Block (What's Innovative) - **[Moro AgriExpert Farm Calc](https://marlvel.ai/apps/moro-agriexpert-farm-calc)** by BMAC INFOTECH: This app enters the utility space by providing specialized dose and calibration calculators for the agricultural engineering sector. - Offers highly specific boom spray calibration tools for precision agricultural chemical application. - **[Sludge Dewatering Calculator](https://marlvel.ai/apps/sludge-dewatering-calculator)** by Shanghai Sheyuan Network Technology Co., Ltd.: This newcomer targets the environmental engineering niche, competing for the same industrial utility market as PetroCalc. - Focuses on offline-first calculation engines for remote industrial sites with poor connectivity. ## What's New - **Latest (v2.1.1, 1 months ago):** Improved reference temperature unit handling for API-to-Density calculations. ## App Momentum (Maintenance) {#momentum} - No notable signals last 3 months > **Cadence:** 1 total versions Β· 0 majors in last 6 months Β· 30 days since last update ## The "So What?" (Strategic Takeaway) {#so-what} Haverly's PetroCalc is a market-leading utilities app that is completely free. With a 4.67/5 rating from 3 reviews, it delivers strong user satisfaction. > **Bottom Line:** PetroCalc provides reliable offline utility for petroleum engineers, but its lack of safety-critical workflows and dated UI limit its professional reach, so the team must prioritize safety-workflow integration to remain competitive. **Best for:** Petroleum, chemical, and process engineers, as well as engineering students requiring field-ready calculation tools. ### PM Action Plan (Next Best Moves) - [ ] [INVEST] [MEDIUM IMPACT] Refresh UI design because the current interface is stagnant compared to ResEditor β†’ increase user retention. β€” *ResEditor sets a modern UI benchmark that highlights PetroCalc's dated appearance.* _(trade-off: deprioritize Pause the distillation-curve tool expansion β€” UI modernization is critical for professional perception.)_ - [ ] [PIVOT] [HIGH IMPACT] Audit safety-critical workflow gaps because Drilling Engineering dominates via well control sheets β†’ capture drilling engineer segment. β€” *Drilling Engineering's well control sheets are a primary competitive advantage.* _(trade-off: deprioritize Deprioritize minor property calculation updates β€” safety-critical workflows are higher-value features.)_ ### Feature Gaps vs Competitors - Well control kill sheets (available in Drilling Engineering but missing here) - Stuck pipe identification logic (available in Drilling Engineering but missing here) - Fleet maintenance tracking (available in MyHSRC but missing here) ### Outlook: Stable The petroleum utility market is consolidating around specialized, workflow-integrated tools rather than general-purpose calculators. PetroCalc's maintenance-mode posture leaves it exposed to agile entrants, so the team must pivot toward safety-critical workflows to prevent user churn to specialized rivals. - βšͺ The app remains in maintenance mode with no recent feature additions, signaling a focus on brand awareness over active user growth. - πŸ”΄ Niche competitors like Sludge Dewatering Calculator are entering the offline-first utility space, which will increase pressure on PetroCalc's core value proposition. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Overall Rating | 4.67/5 | | Total Reviews | 3 | | Sentiment | Excited (80/100) | | Confidence | Low | | Pricing Model | Free | | Platforms | iOS | | Key Features | 3 analyzed | | Trend | Mixed | | Outlook | Stable | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Haverly's PetroCalc** (this app) | 4.67/5 | Excited | Haverly Systems, Inc. | | [ResEditor](https://marlvel.ai/apps/reseditor) | 5.0/5 | N/A | Christopher Van Hoose | | [Moro AgriExpert Farm Calc](https://marlvel.ai/apps/moro-agriexpert-farm-calc) | N/A/5 | N/A | BMAC INFOTECH | | [MyHSRC (Siemens Energy)](https://marlvel.ai/apps/myhsrc-siemens-energy) | 5.0/5 | N/A | Siemens Energy | | [EFB-Pro](https://marlvel.ai/apps/efb-pro) | 5.0/5 | N/A | CAVU Companies | | [NEB Tools](https://marlvel.ai/apps/neb-tools) | 3.9/5 | N/A | New England Biolabs Inc | ## Company Profile - **Developer:** Haverly Systems, Inc. - **Website:** [https://www.haverly.com](https://www.haverly.com) - **Social:** [LinkedIn](https://www.linkedin.com/in/randy-s-454a0b75) ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/haverlys-petrocalc/id1125079839?uo=4) - **Dev Site:** [Official Website](https://www.haverly.com) - **Sources:** Developer website content, About us / company information, App store metadata, User reviews. ## Related Intel Reports - [*ResEditor*](https://marlvel.ai/apps/reseditor) (Christopher Van Hoose) β€” 5.0/5 Rating | N/A Sentiment - [*Moro AgriExpert Farm Calc*](https://marlvel.ai/apps/moro-agriexpert-farm-calc) (BMAC INFOTECH) β€” N/A Rating | N/A Sentiment - [*MyHSRC (Siemens Energy)*](https://marlvel.ai/apps/myhsrc-siemens-energy) (Siemens Energy) β€” 5.0/5 Rating | N/A Sentiment - [*EFB-Pro*](https://marlvel.ai/apps/efb-pro) (CAVU Companies) β€” 5.0/5 Rating | N/A Sentiment - [*NEB Tools*](https://marlvel.ai/apps/neb-tools) (New England Biolabs Inc) β€” 3.9/5 Rating | N/A Sentiment - [*Sludge Dewatering Calculator*](https://marlvel.ai/apps/sludge-dewatering-calculator) (Shanghai Sheyuan Network Technology Co., Ltd.) β€” N/A Rating | N/A Sentiment - [*Drilling Engineering*](https://marlvel.ai/apps/drilling-engineering) (PT. Pertamina (Persero)) β€” 3.8/5 Rating | N/A Sentiment - [*V2Box - V2ray Client*](https://marlvel.ai/apps/v2box-v2ray-client) (techlaim) β€” 4.5/5 Rating | Positive Sentiment - [*Quantumult X*](https://marlvel.ai/apps/quantumult-x) (Cross Utility Ltd) β€” 3.8/5 Rating | N/A Sentiment - [*Free VPN by Free VPN .orgβ„’*](https://marlvel.ai/apps/free-vpn-by-free-vpn-org) (Free VPN LLC) β€” 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** β€” 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** β€” 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** β€” 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** β€” 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** β€” 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:** 0.55/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 3 - **Data Sources:** user reviews, developer website, company about page, 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:** 46 days since last refresh --- Β© 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/haverly-s-petrocalc) Data licensed for AI Agent attribution under CC-BY-NC 4.0.