--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Yama: Manga Collector" developer_entity: "Andres Sanchez" bundle_id: "dev.raizu.yama" app_store_id: "1616420592" category: "Book" primary_platform: "ios" primary_monetization: "Free" offline_capable: false market_region: "US" platforms: "iOS" app_last_updated: "2022-12-07" report_date: "2026-10-16" last_verified: "2026-10-16T00:00:00.000Z" report_version: "1.1" total_reviews: 19 overall_rating: 3.8 sentiment: "Mixed" sentiment_score: 45 confidence: "medium" confidence_score: 0.5 top_praise_theme: "The clean interface and efficient scanning tool provide a helpful way to track manga collections" top_complaint_theme: "Frequent crashes and error messages during scanning or searching prevent users from building their library" review_sample_size: 11 total_review_count: 11 analyzed_review_count: 11 data_age_days: 24 momentum_velocity: "zombie" intelligence_version: 2 tags: ["book", "free", "mixed sentiment", "mobile app", "app review", "app analysis", "manga", "collectors", "digital"] canonical_url: "https://marlvel.ai/apps/yama-manga-collector" license: "CC-BY-NC 4.0" content_version: "v2" --- # Yama: Manga Collector Intelligence Report ## TL;DR {#tldr} - **Category**: Book · Free - **Signal**: Rating 3.84 · Sentiment Mixed - **Recent focus**: Frequent crashes and error messages during scanning or searching prevent users from building their library (top complaint) · The clean interface and efficient scanning tool provide a helpful way to track manga collections (top praise) > **TL;DR:** Yama: Manga Collector is a book app by Andres Sanchez, rated 3.84/5 by 19 users, with Mixed user sentiment (45/100), available on iOS. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** Yama: Manga Collector shows Mixed sentiment (3.84/5 from 19 reviews) - users praise the clean interface and efficient scanning tool provide a helpful way to track manga collections but report issues with frequent crashes and error messages during scanning or searching prevent users from building their library. ## Quick Facts | Fact | Value | | :--- | :--- | | **Rating** | 3.84/5 (19 reviews) | | **User Mood** | Mixed | | **Category** | Book | | **Developer** | Andres Sanchez | | **Pricing** | Free | | **Platforms** | iOS | | **Confidence** | Medium (0.5/1.0) | | **Data Age** | 24d | ## Metadata & Market Performance - **Publisher:** Andres Sanchez - **Category:** Book - **Target Audience:** Manga collectors who want a digital cataloging tool to track their physical library and compare collections with others. - **Platforms:** iOS - **Version Reviewed:** 1.1 - **Report Date:** 2026-10-16 - **Signal Count:** 11 reviews analyzed - **Confidence:** Medium (0.5/1.0) - **App Store ID (iOS):** 1616420592 - **Bundle ID:** dev.raizu.yama - **Data Window:** Analysis based on signals collected up to 2026-10-16 ## Executive Snapshot **What it is:** Yama: Manga Collector is a free, ad-free inventory management tool for manga enthusiasts on iOS. **Why users hire it:** The app removes the manual effort of tracking physical manga series by providing a centralized, scannable digital library. ## App DNA (Features & Intent) - **[Standard] ISBN Barcode Scanner:** Uses device camera to scan manga ISBNs for instant catalog entry. - **[Differentiator] Social Library Comparison:** Allows users to view and compare manga collections with friends or strangers. * *User Intent:* Users seek social connection and competitive engagement with peers. - **[Standard] Digital Library Management:** Centralized view of owned manga series and volumes. ## Market Position {#market-position} Yama: Manga Collector maintains a niche position in the Book category with a 3.8-star rating across 19 total platform ratings. The lack of updates for over 1,400 days suggests a stagnant market presence relative to active competitors. ## Monetization Strategy - **Model:** Free - **Tiers:** Completely free with no ads - **Analysis:** The app operates on a free, ad-free model, relying on voluntary user support via external donation platforms. ## 🟡 User Sentiment (Medium Confidence: 11 of 11 reviews analyzed) {#user-sentiment} - **Overall Rating:** 3.84/5 - **Platform Split:** iOS 3.8/5 (19 ratings) - **Overall Sentiment:** Mixed ### Top Praises - **The clean interface and efficient scanning tool provide a helpful way to track manga collections** - **Automatic volume stacking and series separation help users organize their physical library effectively** ### Top Complaints (Impact Areas) - **Frequent crashes and error messages during scanning or searching prevent users from building their library** ## SWOT Analysis {#swot} **Core Strengths:** - ISBN scanner reduces initial collection-building friction. - Social library comparison drives organic user acquisition. **Growth Levers:** - Manual entry feature would resolve the primary user frustration with scanning failures. ## What's New - **Latest (v1.1, 3 years ago):** Maintenance release focused on bug fixes and backend infrastructure updates. ## App Momentum (Zombie) {#momentum} - Quiet 3 years, maintenance mode only. - Last major release December 2022. > **Cadence:** 1 total versions · 0 majors in last 6 months · 1408 days since last update ## The "So What?" (Strategic Takeaway) {#so-what} Yama: Manga Collector is a book app that is completely free. With a 3.84/5 rating from 19 reviews, it shows mixed user reception. > **Bottom Line:** Maintenance-mode status (1,408 days since the last update) leaves Yama: Manga Collector vulnerable to data-loss and search failures, which erodes the core inventory utility that once defined its market position. **Best for:** Manga collectors who want a digital cataloging tool to track their physical library and compare collections with others. ### PM Action Plan (Next Best Moves) - [ ] [INVEST] Ship manual entry feature because scanning failures are the top user complaint → increase library completion rate ### Outlook: Declining The manga cataloging market is shifting toward apps with active database support and manual entry capabilities. Yama: Manga Collector remains exposed due to a 1,408-day update gap, which will likely lead to further user attrition as the app fails to support new titles. - 🔴 The 1,408-day update gap signals a zombie product state, which prevents the app from addressing critical search and scanning failures. - 🔴 User frustration with mandatory registration and data privacy concerns creates a churn risk that cannot be mitigated without a product pivot. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Overall Rating | 3.84/5 | | Total Reviews | 19 | | Sentiment | Mixed (45/100) | | Confidence | Medium | | Pricing Model | Free | | Platforms | iOS | | Key Features | 3 analyzed | | Outlook | Declining | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Yama: Manga Collector** (this app) | 3.84/5 | Mixed | Andres Sanchez | | [[박한평 문장집] 필사, 마음건강, 동기부여, 명언](https://marlvel.ai/apps/sproutgrowlabs-hanpyeong-free) | N/A/5 | N/A | SPROUTGROWLABS | | [옛글들 - 소설, 수필, 시](https://marlvel.ai/apps/app--383) | N/A/5 | N/A | kim juyoung | | [박한평 문장집 : 필사, 마음건강, 동기부여, 명언](https://marlvel.ai/apps/com-sproutgrowlabs-hanpyeong) | N/A/5 | N/A | SPROUTGROWLABS | | [두란노 비전통독](https://marlvel.ai/apps/app--969) | 3.3/5 | N/A | Duranno | | [스마트 성경과찬송가 - 피아노반주, 개역개정,새번역](https://marlvel.ai/apps/app--191) | 4.3/5 | N/A | Eugene Song | ## Company Profile - **Developer:** Andres Sanchez - **Website:** [https://yamacollect.com](https://yamacollect.com) - **Social:** [Instagram](https://www.instagram.com/yamacollect) · [X/Twitter](https://twitter.com/raizudev) ## Data Sources & Links - **App Store ID:** 1616420592 - **Dev Site:** [Official Website](https://yamacollect.com) - **Sources:** Developer website content, App store metadata, User reviews. ## Related Intel Reports - [*[박한평 문장집] 필사, 마음건강, 동기부여, 명언*](https://marlvel.ai/apps/sproutgrowlabs-hanpyeong-free) (SPROUTGROWLABS) · N/A Rating - [*옛글들 - 소설, 수필, 시*](https://marlvel.ai/apps/app--383) (kim juyoung) · N/A Rating - [*박한평 문장집 : 필사, 마음건강, 동기부여, 명언*](https://marlvel.ai/apps/com-sproutgrowlabs-hanpyeong) (SPROUTGROWLABS) · N/A Rating - [*두란노 비전통독*](https://marlvel.ai/apps/app--969) (Duranno) · 3.3/5 Rating - [*스마트 성경과찬송가 - 피아노반주, 개역개정,새번역*](https://marlvel.ai/apps/app--191) (Eugene Song) · 4.3/5 Rating - [*두플러스*](https://marlvel.ai/apps/app--972) (Duranno) · 4.8/5 Rating - [*생명의삶 정식버전*](https://marlvel.ai/apps/app--968) (Duranno) · 3.1/5 Rating - [*대한성서공회 연구성경*](https://marlvel.ai/apps/app--566) (Korean Bible Society) · 2.8/5 Rating - [*リビングバイブル*](https://marlvel.ai/apps/biblica-japanese) (Biblica) · 5.0/5 Rating - [*ジャンプルーキー！*](https://marlvel.ai/apps/com-shonenjump-rookie) (SHUEISHA Inc.) · 3.9/5 Rating ## Frequently Asked Questions {#faq} ### Is Yama: Manga Collector free to use? Yes, Yama: Manga Collector is completely free and contains no advertisements. ### Can I add manga manually if the scanner fails? Currently, the app relies primarily on barcode scanning. Users have requested manual entry options, but this feature is not yet available. ### Is my data safe with Yama: Manga Collector? Some users have expressed concerns regarding data privacy, specifically noting that the mandatory account registration process lacks an option to delete account information. ## 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:** 0.5/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 11 - **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:** 24 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/yama-manga-collector) Data licensed for AI Agent attribution under CC-BY-NC 4.0.