--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Stoichiometry" developer_entity: "Roman Volinsky" bundle_id: "com.appleVR.Stoichiometry" app_store_id: "1330949637" category: "Education" primary_platform: "ios" primary_monetization: "Paid" offline_capable: false market_region: "US" platforms: "iOS" app_last_updated: "2024-10-11" report_date: "2026-09-20" last_verified: "2026-09-20T00:00:00.000Z" report_version: "5.3" total_reviews: 0 sentiment: "Thrilled" sentiment_score: 90 confidence: "medium" confidence_score: 0.45 top_praise_theme: "Comprehensive feature coverage ensures that all necessary data points are accounted for during user sessions" review_sample_size: 1 total_review_count: 1 analyzed_review_count: 1 data_age_days: 10 momentum_velocity: "zombie" intelligence_version: 2 tags: ["education", "paid", "thrilled sentiment", "mobile app", "app review", "app analysis", "chemistry", "students", "laboratory"] canonical_url: "https://marlvel.ai/apps/stoichiometry" license: "CC-BY-NC 4.0" content_version: "v2" --- # Stoichiometry Intelligence Report ## TL;DR {#tldr} - **Category**: Education · Paid - **Signal**: Sentiment Thrilled - **Recent focus**: Comprehensive feature coverage ensures that all necessary data points are accounted for during user sessions (top praise) > **TL;DR:** Stoichiometry is a education app by Roman Volinsky, with Thrilled user sentiment (90/100), available on iOS. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** Stoichiometry is a education app by Roman Volinsky. ## Quick Facts | Fact | Value | | :--- | :--- | | **User Mood** | Thrilled | | **Category** | Education | | **Developer** | Roman Volinsky | | **Pricing** | Paid | | **Platforms** | iOS | | **Confidence** | Medium (0.45/1.0) | | **Data Age** | 10d | ## Metadata & Market Performance - **Publisher:** Roman Volinsky - **Category:** Education - **Target Audience:** Chemistry students and laboratory professionals requiring precise stoichiometric calculations and reaction balancing. - **Platforms:** iOS - **Version Reviewed:** 5.3 - **Report Date:** 2026-09-20 - **Signal Count:** 1 review analyzed - **Confidence:** Medium (0.45/1.0) - **App Store ID (iOS):** 1330949637 - **Bundle ID:** com.appleVR.Stoichiometry - **Data Window:** Analysis based on signals collected up to 2026-09-20 ## Executive Snapshot **What it is:** Stoichiometry is a specialized chemistry utility for balancing reactions and calculating reactant quantities on iOS and Mac. **Why users hire it:** The tool removes the cognitive friction of manual stoichiometric calculations for students and laboratory professionals. ## App DNA (Features & Intent) - **[Standard] Chemical Reaction Balancing:** Automated balancing of chemical equations including unlimited components and state indexes. - **[Differentiator] Quantitative Stoichiometric Analysis:** Calculates molar masses, moles, and actual masses of reactants and products based on input quantitative data. * *User Intent:* Users seek enhanced value through premium features. - **[Differentiator] Limiting Reagent Identification:** Automatically identifies the limiting reagent when data is provided for multiple components. * *User Intent:* Users seek enhanced value through premium features. - **[Differentiator] Gas Phase Integration:** Exports reaction data to the Gas Phase Stoichiometry app for pressure and volume calculations. ## Market Position {#market-position} Stoichiometry occupies a niche utility space in the Education category, relying on a $2.99 paid model rather than ad-supported volume. The lack of recent updates suggests a stable, legacy position rather than an aggressive growth strategy. ## Monetization Strategy - **Model:** Paid - **Tiers:** Single purchase at $2.99 - **Price:** iOS: $2.99 - **Analysis:** Flat-fee paid model at $2.99, targeting students and professionals requiring specialized chemistry utilities. ## 🟢 User Sentiment (Medium Confidence: 1 of 1 review analyzed) {#user-sentiment} - **Overall Sentiment:** Thrilled ### Top Praises - **Comprehensive feature coverage ensures that all necessary data points are accounted for during user sessions** ## SWOT Analysis {#swot} **Core Strengths:** - Specialized calculation engine creates a defensible barrier against general-purpose math tools. - Cross-app integration with Gas Phase Stoichiometry creates a multi-tool acquisition lever. **Growth Levers:** - Localized pricing could capture students in academic-heavy markets. ## What's New - **Latest (v5.3, 1 years ago):** Maintenance update focused on compatibility. ## App Momentum (Zombie) {#momentum} - Ships maintenance updates only. - Last major release two years ago. > **Cadence:** 1 total versions · 0 majors in last 6 months · 708 days since last update ## The "So What?" (Strategic Takeaway) {#so-what} Stoichiometry is an education app that is a paid app. > **Bottom Line:** Maintaining the current calculation engine ensures Stoichiometry remains a reliable utility for its core audience, but the lack of updates risks long-term relevance against more active competitors. **Best for:** Chemistry students and laboratory professionals requiring precise stoichiometric calculations and reaction balancing. ### PM Action Plan (Next Best Moves) - [ ] [MAINTAIN] Maintain core calculation engine because it is the primary value proposition → sustain current user satisfaction. ### Outlook: Stable The education utility market is increasingly favoring freemium models that lower the barrier to entry for students. Stoichiometry remains exposed due to its stagnant release cadence and paid-upfront model, which will likely lead to a gradual decline in relevance as more active, ad-supported rivals capture the student segment. - ⚪ The two-year release gap indicates a maintenance-only posture, which limits the potential for new user acquisition in a crowded education utility market. - 🟢 High satisfaction from the existing user base suggests the core calculation engine remains functional and meets the needs of its target audience. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Total Reviews | 0 | | Sentiment | Thrilled (90/100) | | Confidence | Medium | | Pricing Model | Paid | | Platforms | iOS | | Key Features | 4 analyzed | | Outlook | Stable | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Stoichiometry** (this app) | N/A/5 | Thrilled | Roman Volinsky | | [Catbus Student](https://marlvel.ai/apps/catbus-student) | 4.3/5 | N/A | Cohota Join Stock Company | | [Money Matrix (CAD)](https://marlvel.ai/apps/money-matrix-cad) | 5.0/5 | N/A | Blooming Kids Software LLC | | [Quran Treasure Island for Kids](https://marlvel.ai/apps/quran-treasure-island-for-kids) | 4.9/5 | Mixed | Akeela Manekia | | [Valencia College - MyVC](https://marlvel.ai/apps/valencia-college-myvc) | 5.0/5 | N/A | Valencia College | | [Verbi: Learn a New Language](https://marlvel.ai/apps/verbi-learn-a-new-language) | 4.3/5 | n/a | ACADIA LABS INC. | ## Company Profile - **Developer:** Roman Volinsky - **Website:** [https://www.volard.wordpress.com](https://www.volard.wordpress.com) - **Social:** [Facebook](https://www.facebook.com/sharer/sharer.php?kid_directed_site=0) · [X/Twitter](https://twitter.com/intent) ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/stoichiometry/id1330949637?uo=4) - **Dev Site:** [Official Website](https://www.volard.wordpress.com) - **Sources:** Developer website content, App store metadata, User reviews. ## Related Intel Reports - [*Catbus Student*](https://marlvel.ai/apps/catbus-student) (Cohota Join Stock Company) · 4.3/5 Rating - [*Money Matrix (CAD)*](https://marlvel.ai/apps/money-matrix-cad) (Blooming Kids Software LLC) · 5.0/5 Rating - [*Quran Treasure Island for Kids*](https://marlvel.ai/apps/quran-treasure-island-for-kids) (Akeela Manekia) · 4.9/5 Rating - [*Valencia College - MyVC*](https://marlvel.ai/apps/valencia-college-myvc) (Valencia College) · 5.0/5 Rating - [*Verbi: Learn a New Language*](https://marlvel.ai/apps/verbi-learn-a-new-language) (ACADIA LABS INC.) · 4.3/5 Rating - [*자주 틀리는 우리말*](https://marlvel.ai/apps/app--424) (DaolSoft, Co., Ltd.) · N/A Rating - [*달공부 - 한 달 공부 다이어리 + 루틴/공부 타이머*](https://marlvel.ai/apps/azlabs-dalstudy) (SuWon Choi) · N/A Rating - [*타요콘 - 타요 아바타 놀이동화*](https://marlvel.ai/apps/com-kigle-project-tayocon) (KIGLE) · 3.1/5 Rating - [*천자문 워치*](https://marlvel.ai/apps/app--385) (kim juyoung) · N/A Rating - [*천자문 공부 도우미*](https://marlvel.ai/apps/app--382) (kim juyoung) · 5.0/5 Rating ## Frequently Asked Questions {#faq} ### Is Stoichiometry suitable for high school chemistry students? Yes, the tool is designed for chemistry students and professionals needing to balance reactions and calculate molar masses, making it a fit for high school and university-level chemistry. ### Does Stoichiometry work offline? The app is a utility tool for chemical calculations; while it does not require an internet connection for core balancing, it does not offer cloud-syncing features. ### What is the difference between Stoichiometry and free chemistry calculators? Stoichiometry offers specialized features like limiting reagent identification and integration with the developer's Gas Phase Stoichiometry app, which are often absent in basic free calculators. ### Are there free alternatives to Stoichiometry? There are numerous ad-supported chemistry calculators available on the App Store that offer basic reaction balancing, though they may lack the specific quantitative analysis features found here. ## 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:** 1 - **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:** 10 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/stoichiometry) Data licensed for AI Agent attribution under CC-BY-NC 4.0.