--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Speed Math - Human Calculator" developer_entity: "Evgeny Rubin" bundle_id: "org.reactjs.native.example.humancalc" app_store_id: "1540328708" category: "Education" primary_platform: "ios" primary_monetization: "Free" offline_capable: false market_region: "US" platforms: "iOS" app_last_updated: "2021-02-28" report_date: "2026-08-07" last_verified: "2026-08-07T00:00:00.000Z" report_version: "1.1.3" total_reviews: 28 overall_rating: 4.6 sentiment: "Excited" sentiment_score: 80 confidence: "low" confidence_score: 0.35 top_praise_theme: "The simple interface allows users to practice mental math without getting distracted by unnecessary features" top_complaint_theme: "The calculator keyboard layout is inverted compared to standard devices, causing confusion during rapid input" review_sample_size: 5 total_review_count: 5 analyzed_review_count: 5 data_age_days: 18 momentum_velocity: "zombie" intelligence_version: 3 tags: ["education", "free", "excited sentiment", "mobile app", "app review", "app analysis", "students", "individuals", "looking"] canonical_url: "https://marlvel.ai/apps/speed-math-human-calculator" license: "CC-BY-NC 4.0" content_version: "v2" --- # Speed Math - Human Calculator Intelligence Report ## TL;DR {#tldr} - **Category**: Education · Free - **Signal**: Rating 4.61 · Sentiment Excited - **Recent focus**: The calculator keyboard layout is inverted compared to standard devices, causing confusion during rapid input (top complaint) · The simple interface allows users to practice mental math without getting distracted by unnecessary features (top praise) > **TL;DR:** Speed Math - Human Calculator is a education app by Evgeny Rubin, rated 4.61/5 by 28 users, with Excited user sentiment (80/100), available on iOS. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** Speed Math - Human Calculator maintains Excited user sentiment (4.61/5 from 28 reviews), with users consistently praising the simple interface allows users to practice mental math without getting distracted by unnecessary features. ## Quick Facts | Fact | Value | | :--- | :--- | | **Rating** | 4.61/5 (28 reviews) | | **User Mood** | Excited | | **Category** | Education | | **Developer** | Evgeny Rubin | | **Pricing** | Free | | **Platforms** | iOS | | **Confidence** | Low (0.35/1.0) | | **Data Age** | 18d | ## Metadata & Market Performance - **Publisher:** Evgeny Rubin - **Category:** Education - **Target Audience:** Students and individuals looking to improve mental arithmetic speed through repetitive practice. - **Platforms:** iOS - **Version Reviewed:** 1.1.3 - **Report Date:** 2026-08-07 - **Signal Count:** 5 reviews analyzed - **Confidence:** Low (0.35/1.0) - **App Store ID (iOS):** 1540328708 - **Bundle ID:** org.reactjs.native.example.humancalc - **Performance Trend:** Declining - **Data Window:** Analysis based on signals collected up to 2026-08-07 ## Executive Snapshot **What it is:** Speed Math is an educational app for iOS that provides customizable mental arithmetic drills for students and individuals. **Why users hire it:** Users hire this app to improve calculation speed through repetitive, distraction-free practice sessions that avoid the bloat of general-purpose educational tools. ## App DNA (Features & Intent) - **[Standard] Arithmetic Operation Modes:** Four distinct math operation modes (addition, subtraction, division, multiplication). - **[Standard] Customizable Difficulty:** User-defined settings for task difficulty and session length. * *User Intent:* Users value self-expression and personalized experiences. - **[Differentiator] Task-Based Measurement:** Performance tracking based on either fixed time limits or a set number of math problems. * *User Intent:* Users seek enhanced value through premium features. ## Market Position {#market-position} Speed Math maintains a 4.6-star rating across 28 reviews, but the lack of updates since early 2021 signals a zombie-state product lifecycle. The absence of monetization or modern feature updates suggests the app is not currently competing for market share in the crowded education category. ## Monetization Strategy - **Model:** Free - **Tiers:** Free to download and use - **Analysis:** The app is currently free with no visible subscription or IAP tiers, relying on standard store distribution. ## 🟢 User Sentiment (Low Confidence: 5 of 5 reviews analyzed) {#user-sentiment} - **Overall Rating:** 4.61/5 - **Platform Split:** iOS 4.6/5 (28 ratings) - **Overall Sentiment:** Excited ### Top Praises - **The simple interface allows users to practice mental math without getting distracted by unnecessary features** - **Tracking the time taken for each equation provides a clear metric for measuring personal improvement** ### Top Complaints (Impact Areas) - **The calculator keyboard layout is inverted compared to standard devices, causing confusion during rapid input** ## SWOT Analysis {#swot} **Core Strengths:** - Minimalist interface encourages spontaneous practice sessions without distraction **Growth Levers:** - Adding a competitive leaderboard or social challenge mode could improve retention ## Recent Changes (v2 → v3) {#recent-changes} The competitive outlook has shifted from stable to declining, with the analysis now framing the app as a stagnant product vulnerable to modern, gamified competitors. **Overall trend**: Declining **Compared at**: 2026-08-07 ### High-impact changes - **[Declined] Outlook Trend** (positioning) - **[Shifted] Market Position Narrative** (positioning) ### Medium-impact changes - **[Added] New SWOT Items** (swot) - **[Added] New PM Action Item** (features) ## What's New - **Latest (v1.1.3, 5 years ago):** General bug fixes. ## App Momentum (Zombie) {#momentum} - Quiet 5 years, bug fixes only. - No major feature releases since 2021. > **Cadence:** 1 total versions · 0 majors in last 6 months · 1986 days since last update ## The "So What?" (Strategic Takeaway) {#so-what} Speed Math - Human Calculator is an education app that is completely free. It holds a 4.61/5 rating from 28 reviews. > **Bottom Line:** Speed Math provides a functional, distraction-free arithmetic trainer, but the five-year update drought and counterintuitive keyboard layout create a churn risk that will likely drive users to more frequently updated alternatives, so the developer must prioritize a UI refresh to remain relevant. **Best for:** Students and individuals looking to improve mental arithmetic speed through repetitive practice. ### PM Action Plan (Next Best Moves) - [ ] [PIVOT] Pivot keyboard layout to match standard calculator grids because users report the current inverted layout causes input errors → improve task completion speed ### Outlook: Declining The educational app market is consolidating around gamified, high-frequency update models that prioritize social features and progression. Speed Math's static, unmaintained state leaves it exposed to these modern entrants, and the lack of a clear revenue model suggests the developer is not incentivized to defend this position. - 🔴 The five-year update drought indicates the app is in maintenance mode, which will lead to gradual user attrition as competitors add modern features. - 🔴 Persistent user complaints regarding the inverted keyboard layout remain unaddressed, which erodes the daily active habit for new users. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Overall Rating | 4.61/5 | | Total Reviews | 28 | | Sentiment | Excited (80/100) | | Confidence | Low | | Pricing Model | Free | | Platforms | iOS | | Key Features | 3 analyzed | | Trend | Declining | | Outlook | Declining | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Speed Math - Human Calculator** (this app) | 4.61/5 | Excited | Evgeny Rubin | | [AlgoApp - Flashcards](https://marlvel.ai/apps/algoapp-flashcards) | 4.5/5 | n/a | AlgoApp Inc | | [Elevate - Brain Training Games](https://marlvel.ai/apps/elevate-brain-training-games) | 4.7/5 | n/a | The Mind Company | | [Flashcards Deluxe](https://marlvel.ai/apps/flashcards-deluxe) | 4.5/5 | N/A | OrangeOrApple.com | | [Flash Cards Flashcards Maker](https://marlvel.ai/apps/flash-cards-flashcards-maker) | 4.0/5 | Mixed | Infinite Wave Media, LLC | | [Flashcards maker - AI generate](https://marlvel.ai/apps/flashcards-maker-ai-generate) | 4.1/5 | Mixed | Teleprompter LLC | ## Company Profile - **Developer:** Evgeny Rubin ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/speed-math-human-calculator/id1540328708?uo=4) - **Sources:** App store metadata, User reviews. ## Related Intel Reports - [*AlgoApp - Flashcards*](https://marlvel.ai/apps/algoapp-flashcards) (AlgoApp Inc) · 4.5/5 Rating - [*Elevate - Brain Training Games*](https://marlvel.ai/apps/elevate-brain-training-games) (The Mind Company) · 4.7/5 Rating - [*Flashcards Deluxe*](https://marlvel.ai/apps/flashcards-deluxe) (OrangeOrApple.com) · 4.5/5 Rating - [*Flash Cards Flashcards Maker*](https://marlvel.ai/apps/flash-cards-flashcards-maker) (Infinite Wave Media, LLC) · 4.0/5 Rating - [*Flashcards maker - AI generate*](https://marlvel.ai/apps/flashcards-maker-ai-generate) (Teleprompter LLC) · 4.1/5 Rating - [*Impulse - Brain Training*](https://marlvel.ai/apps/impulse-brain-training) (GMRD Apps Limited) · 4.6/5 Rating - [*Peak - Brain Training*](https://marlvel.ai/apps/peak-brain-training) (Synaptic Labs) · 4.7/5 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 ## 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:** 0.35/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 5 - **Data Sources:** user reviews, 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:** 18 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/speed-math-human-calculator) Data licensed for AI Agent attribution under CC-BY-NC 4.0.