--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Acid Base pH" developer_entity: "Roman Volinsky" bundle_id: "com.appleVR.AcidBasepH" app_store_id: "977951851" category: "Education" primary_platform: "ios" primary_monetization: "Paid" offline_capable: false market_region: "US" platforms: "iOS" app_last_updated: "2024-09-06" report_date: "2026-10-07" last_verified: "2026-10-07T00:00:00.000Z" report_version: "8.8" total_reviews: 1 overall_rating: 5 sentiment: "Thrilled" sentiment_score: 90 confidence: "medium" confidence_score: 0.45 top_praise_theme: "The application functions as intended without any technical errors or performance issues for users" review_sample_size: 1 total_review_count: 1 analyzed_review_count: 1 data_age_days: 38 momentum_velocity: "zombie" intelligence_version: 2 tags: ["education", "paid", "thrilled sentiment", "mobile app", "app review", "app analysis", "chemistry", "students,", "researchers,"] canonical_url: "https://marlvel.ai/apps/acid-base-ph" license: "CC-BY-NC 4.0" content_version: "v2" --- # Acid Base pH Intelligence Report ## TL;DR {#tldr} - **Category**: Education · Paid - **Signal**: Rating 5 · Sentiment Thrilled - **Recent focus**: The application functions as intended without any technical errors or performance issues for users (top praise) > **TL;DR:** Acid Base pH is a education app by Roman Volinsky, rated 5/5 by 1 users, with Thrilled user sentiment (90/100), available on iOS. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** Acid Base pH maintains Thrilled user sentiment (5/5 from 1 review), with users consistently praising the application functions as intended without any technical errors or performance issues for users. ## Quick Facts | Fact | Value | | :--- | :--- | | **Rating** | 5/5 (1 review) | | **User Mood** | Thrilled | | **Category** | Education | | **Developer** | Roman Volinsky | | **Pricing** | Paid | | **Platforms** | iOS | | **Confidence** | Medium (0.45/1.0) | | **Data Age** | 38d | ## Metadata & Market Performance - **Publisher:** Roman Volinsky - **Category:** Education - **Target Audience:** Chemistry students, researchers, and laboratory professionals requiring precise pH and titration curve estimations. - **Platforms:** iOS - **Version Reviewed:** 8.8 - **Report Date:** 2026-10-07 - **Signal Count:** 1 review analyzed - **Confidence:** Medium (0.45/1.0) - **App Store ID (iOS):** 977951851 - **Bundle ID:** com.appleVR.AcidBasepH - **Data Window:** Analysis based on signals collected up to 2026-10-07 ## Executive Snapshot **What it is:** Acid Base pH is a specialized chemistry calculation tool for students and researchers, providing pH estimation and titration curve plotting on iOS. **Why users hire it:** The app removes the manual complexity of calculating simultaneous dissociation stages for polyprotic acids and bases, providing a reliable digital substitute for traditional laboratory reference tables. ## App DNA (Features & Intent) - **[Differentiator] Titration Curve Plotting:** Generates visual titration curves based on user-defined analyte and titrant parameters. - **[Differentiator] pH Estimation Engine:** Calculates pH values for weak and strong, monoprotic and polyprotic acids and bases using simultaneous dissociation calculations. * *User Intent:* Users seek enhanced value through premium features. - **[Differentiator] Customizable Kw:** Allows manual adjustment of the water dissociation constant to account for temperature variations. * *User Intent:* Users value self-expression and personalized experiences. ## Market Position {#market-position} Acid Base pH occupies a specialized niche in the Education category, priced at $3.99. The app's lack of updates for over 760 days signals a maintenance-only posture that prioritizes stability over market share expansion. ## Monetization Strategy - **Model:** Paid - **Tiers:** $3.99 one-time purchase - **Price:** iOS: $3.99 - **Analysis:** The app utilizes a straightforward paid model at a $3.99 price point, targeting students and professionals requiring specialized chemical calculation tools. ## 🟢 User Sentiment (Medium Confidence: 1 of 1 review analyzed) {#user-sentiment} - **Overall Rating:** 5/5 - **Platform Split:** iOS 5.0/5 (1 ratings) - **Overall Sentiment:** Thrilled ### Top Praises - **The application functions as intended without any technical errors or performance issues for users** ## SWOT Analysis {#swot} **Core Strengths:** - Advanced quantitative engine calculates simultaneous dissociation stages **Growth Levers:** - Freemium model could expand the student user base ## What's New - **Latest (v8.8, 2 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 · 761 days since last update ## The "So What?" (Strategic Takeaway) {#so-what} Acid Base pH is an education app that is a paid app. It holds a 5/5 rating from 1 review. > **Bottom Line:** Acid Base pH provides high-precision utility that retains its core audience, but the two-year development silence risks obsolescence. Prioritizing a compatibility audit will defend the current user base against OS-level changes. **Best for:** Chemistry students, researchers, and laboratory professionals requiring precise pH and titration curve estimations. ### PM Action Plan (Next Best Moves) - [ ] [MAINTAIN] Audit compatibility with the latest iOS version because the app has been silent for over 25 months → maintain current user trust ### Outlook: Stable The market for specialized academic utilities is consolidating, with users favoring stable, proven tools over frequently updated but less precise alternatives. Acid Base pH remains advantaged by its specialized calculation engine, but the long-term outlook depends on maintaining compatibility with evolving mobile operating systems. - ⚪ The maintenance-only cadence (no updates for over 760 days) limits growth potential but preserves the app's core functional utility for existing users. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Overall Rating | 5/5 | | Total Reviews | 1 | | Sentiment | Thrilled (90/100) | | Confidence | Medium | | Pricing Model | Paid | | Platforms | iOS | | Key Features | 3 analyzed | | Outlook | Stable | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Acid Base pH** (this app) | 5/5 | Thrilled | Roman Volinsky | | [ALPA: Lernspiele für Kinder](https://marlvel.ai/apps/alpa-lernspiele-fur-kinder) | N/A/5 | N/A | ALPA Kids OU | | [ATPdigital (Legacy)](https://marlvel.ai/apps/atpdigital-legacy) | 2.0/5 | n/a | Bristol Groundschool International Ltd | | [Catbus Student](https://marlvel.ai/apps/catbus-student) | 4.1/5 | N/A | Cohota Join Stock Company | | [Chinese Tibetan Dictionary](https://marlvel.ai/apps/chinese-tibetan-dictionary) | 5.0/5 | Thrilled | Lobsang Monlam16922404891 | | [Insights to Behavior](https://marlvel.ai/apps/insights-to-behavior) | N/A/5 | N/A | Insights to Behavior | ## Company Profile - **Developer:** Roman Volinsky - **Website:** [https://volard.wordpress.com](https://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 ID:** 977951851 - **Dev Site:** [Official Website](https://volard.wordpress.com) - **Sources:** Developer website content, App store metadata, User reviews. ## Related Intel Reports - [*ALPA: Lernspiele für Kinder*](https://marlvel.ai/apps/alpa-lernspiele-fur-kinder) (ALPA Kids OU) · N/A Rating - [*ATPdigital (Legacy)*](https://marlvel.ai/apps/atpdigital-legacy) (Bristol Groundschool International Ltd) · 2.0/5 Rating - [*Catbus Student*](https://marlvel.ai/apps/catbus-student) (Cohota Join Stock Company) · 4.1/5 Rating - [*Chinese Tibetan Dictionary*](https://marlvel.ai/apps/chinese-tibetan-dictionary) (Lobsang Monlam16922404891) · 5.0/5 Rating | Excellent Sentiment - [*Insights to Behavior*](https://marlvel.ai/apps/insights-to-behavior) (Insights to Behavior) · N/A Rating - [*Legasthenie & LRS Trainer*](https://marlvel.ai/apps/legasthenie-lrs-trainer) (Matthias Aigner) · N/A Rating - [*Lyceum Leaf Parent*](https://marlvel.ai/apps/lyceum-leaf-parent) (Techcess Business Solutions (Pvt) Ltd) · N/A Rating - [*Money Matrix (CAD)*](https://marlvel.ai/apps/money-matrix-cad) (Blooming Kids Software LLC) · 5.0/5 Rating - [*myTibetan*](https://marlvel.ai/apps/mytibetan) (Yury Nevalenny) · 4.8/5 Rating | Excellent Sentiment - [*Quran Treasure Island for Kids*](https://marlvel.ai/apps/quran-treasure-island-for-kids) (Akeela Manekia) · 4.9/5 Rating ## Frequently Asked Questions {#faq} ### Is Acid Base pH suitable for university-level chemistry coursework? Yes, the app is designed for students and researchers, providing advanced quantitative analysis for monoprotic and polyprotic acids and bases. ### Does Acid Base pH require an internet connection to function? The app performs calculations locally, which is ideal for laboratory environments where connectivity may be limited. ### What is the primary difference between the free and paid versions of this app? Acid Base pH is a paid-only app with no free tier, justifying its price through specialized chemical calculation features. ### Are there free alternatives to Acid Base pH? While basic pH calculators exist, Acid Base pH differentiates itself through its ability to handle simultaneous dissociation stages and custom water dissociation constants. ## 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:** 38 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/acid-base-ph) Data licensed for AI Agent attribution under CC-BY-NC 4.0.