--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Study Analysis" developer_entity: "Ryunosuke Shibuya" bundle_id: "com.shibuya.studyanalysis" app_store_id: "1588660635" category: "Productivity" primary_platform: "ios" primary_monetization: "Freemium" offline_capable: false market_region: "US" platforms: "iOS" app_last_updated: "2023-06-29" report_date: "2026-04-23" report_version: "1.4.2" total_reviews: 3 overall_rating: 5 confidence: "low" confidence_score: 0.1 data_age_days: 69 intelligence_version: 2 tags: ["productivity", "freemium", "mobile app", "app review", "app analysis", "students", "preparing", "exams,"] canonical_url: "https://marlvel.ai/apps/study-analysis" license: "CC-BY-NC 4.0" last_verified: "2026-04-23T20:42:10.114Z" --- # Study Analysis App Audit > **TL;DR:** Study Analysis is a productivity app by Ryunosuke Shibuya, rated 5/5 by 3 users, available on iOS. > > **Marlvel.ai App Intelligence** — Independent analysis. US Market. No publisher influence. > **Key Insight:** Study Analysis is a productivity app by Ryunosuke Shibuya. ## Quick Facts | Fact | Value | | :--- | :--- | | **Rating** | 5/5 (3 reviews) | | **Category** | Productivity | | **Developer** | Ryunosuke Shibuya | | **Pricing** | Freemium | | **Platforms** | iOS | | **Confidence** | Low (0.1/1.0) | | **Data Age** | 69d | ## Metadata & Market Performance - **Publisher:** Ryunosuke Shibuya - **Category:** Productivity - **Target Audience:** Students preparing for exams, professional qualifications, or daily academic coursework. - **Platforms:** iOS - **Version Audited:** 1.4.2 - **Audit Date:** 2026-04-23 - **Signal Count:** 0 reviews analyzed - **Confidence:** Low (0.1/1.0) - **App Store ID (iOS):** 1588660635 - **Bundle ID:** com.shibuya.studyanalysis - **Data Window:** Analysis based on signals collected up to 2026-04-23 ## Executive Snapshot Study Analysis is a productivity tool designed to optimize learning retention by applying Ebbinghaus' forgetting curve to study schedules. It enables users to track memory status and daily study time through visual graphs while managing review tasks via automated notifications and barcode-based textbook registration. ## App DNA (Features & Intent) - **[Standard] Forgetting Curve Analytics:** Visualizes memory retention status based on the Ebbinghaus forgetting curve. * *User Intent:* Users want visibility into their own performance and progress. - **[Standard] Customizable Review Cycles:** Allows users to adjust review schedules beyond the default forgetting curve settings. * *User Intent:* Users value self-expression and personalized experiences. - **[Standard] Barcode Textbook Registration:** Simplifies the process of adding study materials by scanning barcodes. * *User Intent:* Users seek enhanced value through premium features. - **[Standard] Task Management and Notifications:** Provides a daily review task list and push notifications to prompt study sessions. * *User Intent:* Users are motivated by consistent progression and daily incentives. - **[Standard] Premium Widgets:** Offers home screen widgets for tracking daily tasks and subject-specific forgetting curves. * *User Intent:* Users are motivated by consistent progression and daily incentives. ## Monetization Strategy - **Model:** Freemium ## The "So What?" (Strategic Takeaway) Study Analysis is an established productivity app that is free with in-app purchases. With a 5/5 rating from 3 reviews, it shows polarized user reception. > **Bottom Line:** The app leverages spaced repetition theory to automate study schedules, offering a one-time purchase for premium widget functionality. **Best for:** Students preparing for exams, professional qualifications, or daily academic coursework. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Overall Rating | 5/5 | | Total Reviews | 3 | | Confidence | Low | | Pricing Model | Freemium | | Platforms | iOS | | Key Features | 5 analyzed | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Study Analysis** (this app) | 5/5 | N/A | Ryunosuke Shibuya | | [Mitsu: AI Life Coach](https://marlvel.ai/apps/mitsu-ai-life-coach) | N/A/5 | Mixed | C2 Insights | | [Pattrn - Discipline Tracker](https://marlvel.ai/apps/pattrn-discipline-tracker) | 4.8/5 | Excited | Pedro Schott | | [ChatGPT](https://marlvel.ai/apps/chatgpt) | 4.8/5 | Excited | OpenAI OpCo, LLC | | [Zoho Show: Presentation Maker](https://marlvel.ai/apps/zoho-show-presentation-maker) | 4.2/5 | N/A | Zoho Corporation | | [Stress Free with AJ](https://marlvel.ai/apps/stress-free-with-aj) | 4.7/5 | Thrilled | Universal Relaxation Ltd | ## Company Profile - **Developer:** Ryunosuke Shibuya - **Website:** [https://www.ryu-appinfo.com/](https://www.ryu-appinfo.com/) ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/study-analysis/id1588660635?uo=4) - **Dev Site:** [Official Website](https://www.ryu-appinfo.com/) - **Sources:** App store metadata. ## Related Intel Reports - [*Mitsu: AI Life Coach*](https://marlvel.ai/apps/mitsu-ai-life-coach) (C2 Insights) — N/A Rating | Mixed Sentiment - [*Pattrn - Discipline Tracker*](https://marlvel.ai/apps/pattrn-discipline-tracker) (Pedro Schott) — 4.8/5 Rating | Positive Sentiment - [*ChatGPT*](https://marlvel.ai/apps/chatgpt) (OpenAI OpCo, LLC) — 4.8/5 Rating | Positive Sentiment - [*Zoho Show: Presentation Maker*](https://marlvel.ai/apps/zoho-show-presentation-maker) (Zoho Corporation) — 4.2/5 Rating | N/A Sentiment - [*Stress Free with AJ*](https://marlvel.ai/apps/stress-free-with-aj) (Universal Relaxation Ltd) — 4.7/5 Rating | Excellent Sentiment - [*Xmind - Mind Map & Brainstorm*](https://marlvel.ai/apps/xmind-mind-map-brainstorm) (Xmind Ltd.) — 4.8/5 Rating | N/A Sentiment - [*AI Assistant: Images & Writing*](https://marlvel.ai/apps/ai-assistant-images-writing) (Bickster LLC) — 4.7/5 Rating | Negative Sentiment - [*VPN - Super Unlimited Proxy*](https://marlvel.ai/apps/vpn-super-unlimited-proxy) (Mobile Jump Pte Ltd) — 4.7/5 Rating | Excellent Sentiment - [*Aquarimate*](https://marlvel.ai/apps/wiselogic-aquarimate) (WiseLogic Inc) — 4.4/5 Rating | N/A Sentiment - [*AI Text to Speech - Read Aloud*](https://marlvel.ai/apps/ai-text-to-speech-read-aloud) (Bickster LLC) — 4.6/5 Rating | N/A Sentiment ## Methodology This report was generated by Marlvel.ai's 3-stage AI intelligence pipeline: 1. **Feature & Positioning Extraction** — Analyzes app metadata, developer website content, and version history to identify key features, target audience, and competitive positioning. 2. **Sentiment Analysis** — Processes user reviews (minimum 5 reviews required) to extract praise themes, complaint themes, and overall sentiment with evidence quotes. 3. **Intelligence Synthesis** — Combines stages 1 & 2 with App Store rankings to produce SWOT analysis, executive summary, and actionable insights. - **Confidence Score:** 0.1/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 0 - **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:** 69 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/study-analysis) Data licensed for AI Agent attribution under CC-BY-NC 4.0.