--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Stone Identifier Rock ID" developer_entity: "Thuong Nguyen Thi" bundle_id: "com.stone.identifier.rock.identification" app_store_id: "1586113453" category: "Education" primary_platform: "ios" primary_monetization: "Subscription" offline_capable: false market_region: "US" platforms: "iOS" app_last_updated: "2024-10-24" report_date: "2026-10-02" last_verified: "2026-10-02T00:00:00.000Z" report_version: "1.7.6" total_reviews: 239 overall_rating: 3.6 sentiment: "Frustrated" sentiment_score: 25 confidence: "medium" confidence_score: 0.55 top_praise_theme: "The rock identification feature provides helpful results for amateur collectors during their initial discovery sessions" top_complaint_theme: "The identification engine frequently returns incorrect results for common specimens, undermining user trust in the software" review_sample_size: 50 total_review_count: 50 analyzed_review_count: 50 data_age_days: 43 momentum_velocity: "zombie" intelligence_version: 2 tags: ["education", "subscription", "frustrated sentiment", "mobile app", "app review", "app analysis", "hobbyist", "geologists", "individuals"] canonical_url: "https://marlvel.ai/apps/stone-identifier-rock-id" license: "CC-BY-NC 4.0" content_version: "v2" --- # Stone Identifier Rock ID Intelligence Report ## TL;DR {#tldr} - **Category**: Education · Subscription - **Signal**: Rating 3.61 · Sentiment Frustrated - **Recent focus**: The identification engine frequently returns incorrect results for common specimens, undermining user trust in the software (top complaint) · The rock identification feature provides helpful results for amateur collectors during their initial discovery sessions (top praise) > **TL;DR:** Stone Identifier Rock ID is a education app by Thuong Nguyen Thi, rated 3.61/5 by 239 users, with Frustrated user sentiment (25/100), available on iOS. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** Stone Identifier Rock ID faces Frustrated user sentiment (3.61/5 from 239 reviews), with users reporting the identification engine frequently returns incorrect results for common specimens, undermining user trust in the software as the primary concern. ## Quick Facts | Fact | Value | | :--- | :--- | | **Rating** | 3.61/5 (239 reviews) | | **User Mood** | Frustrated | | **Category** | Education | | **Developer** | Thuong Nguyen Thi | | **Pricing** | Subscription | | **Platforms** | iOS | | **Confidence** | Medium (0.55/1.0) | | **Data Age** | 43d | ## Metadata & Market Performance - **Publisher:** Thuong Nguyen Thi - **Category:** Education - **Target Audience:** Hobbyist geologists and individuals interested in identifying crystals and stones. - **Platforms:** iOS - **Version Reviewed:** 1.7.6 - **Report Date:** 2026-10-02 - **Signal Count:** 50 reviews analyzed - **Confidence:** Medium (0.55/1.0) - **App Store ID (iOS):** 1586113453 - **Bundle ID:** com.stone.identifier.rock.identification - **Data Window:** Analysis based on signals collected up to 2026-10-02 ## Executive Snapshot **What it is:** Stone Identifier Rock ID is an education app for iOS that uses camera input to identify rocks and crystals for hobbyists. **Why users hire it:** The app removes the manual effort of geological research for beginners, but the current paywall friction prevents users from verifying the core value proposition before purchase. ## App DNA (Features & Intent) - **[Standard] Image-based Identification:** Automated recognition of rock and crystal types using camera input. - **[Standard] Geological Collection Tracking:** Digital logging system to record and organize identified rock findings. * *User Intent:* Users want visibility into their own performance and progress. - **[Standard] Premium Subscription:** Access to advanced identification features and unlimited usage. * *User Intent:* Users seek enhanced value through premium features. ## Market Position {#market-position} Stone Identifier Rock ID maintains a 3.6★ rating across 239 total ratings, reflecting a significant gap between user expectations for accuracy and the software's performance. The subscription-only model creates a high barrier to entry that is not supported by the current identification engine's reliability. ## Monetization Strategy - **Model:** Subscription - **Tiers:** Premium Weekly at $3.99/week, Premium Yearly at $39.99/year - **Analysis:** Subscription-only model anchored at $39.99 annually, utilizing a high-frequency weekly option to capture casual users. ## 🔴 User Sentiment (Medium Confidence: 50 of 50 reviews analyzed) {#user-sentiment} - **Overall Rating:** 3.61/5 - **Platform Split:** iOS 3.6/5 (239 ratings) - **Overall Sentiment:** Frustrated ### Top Praises - **The rock identification feature provides helpful results for amateur collectors during their initial discovery sessions** - **The collection feature allows users to organize and track their identified specimens in one place** ### Top Complaints (Impact Areas) - **The identification engine frequently returns incorrect results for common specimens, undermining user trust in the software** ## SWOT Analysis {#swot} **Core Strengths:** - Digital collection tracking provides a structured retention loop for amateur collectors. - Image-based identification offers an immediate, low-effort entry point for discovery. **Growth Levers:** - Implementing a limited free-tier identification quota could increase user trust and conversion. - Improving engine accuracy for common minerals would address the primary driver of negative reviews. ## What's New - **Latest (v1.7.6, 1 years ago):** Maintenance update focused on performance optimization and bug resolution. ## App Momentum (Zombie) {#momentum} - Ships maintenance updates only. - No major feature releases in 23 months. > **Cadence:** 1 total versions · 0 majors in last 6 months · 707 days since last update ## The "So What?" (Strategic Takeaway) {#so-what} Stone Identifier Rock ID is an education app. With a 3.61/5 rating from 239 reviews, it faces significant user friction. > **Bottom Line:** Stone Identifier Rock ID must pivot to a freemium model to allow users to verify identification accuracy before purchase. Addressing the engine's failure to distinguish common minerals would unlock the retention potential currently stifled by the aggressive paywall. **Best for:** Hobbyist geologists and individuals interested in identifying crystals and stones. ### PM Action Plan (Next Best Moves) - [ ] [PIVOT] Implement a free-tier identification quota because users refuse to subscribe without testing accuracy → increase conversion. ### Outlook: Declining The market for hobbyist identification tools is increasingly sensitive to accuracy and transparent pricing. Stone Identifier Rock ID remains exposed due to its reliance on a high-friction subscription model that does not match the current software performance. - 🔴 The identification engine's failure to distinguish common specimens drives high churn, which compounds the negative sentiment already present in the user base. - 🔴 The lack of a free-tier trial prevents new users from verifying value, leading to a high-friction funnel that limits growth potential. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Overall Rating | 3.61/5 | | Total Reviews | 239 | | Sentiment | Frustrated (25/100) | | Confidence | Medium | | Pricing Model | Subscription | | Platforms | iOS | | Key Features | 3 analyzed | | Outlook | Declining | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Stone Identifier Rock ID** (this app) | 3.61/5 | Frustrated | Thuong Nguyen Thi | | [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) | 4.4/5 | 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:** Thuong Nguyen Thi ## Data Sources & Links - **App Store ID:** 1586113453 - **Sources:** 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) · 4.4/5 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 Stone Identifier Rock ID free to use? No, the app is subscription-only. Users report that they are unable to test the identification features beyond a single photo without purchasing a weekly or yearly subscription. ### Does Stone Identifier Rock ID accurately identify rocks? User reviews frequently report that the app misidentifies common rocks, often labeling them as incorrect minerals. Accuracy is a primary concern for current users. ### What are some alternatives to Stone Identifier Rock ID? Users looking for rock identification should consider apps that offer a free tier or trial period, as Stone Identifier Rock ID currently restricts all testing behind a paywall. ## 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:** 0.55/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 50 - **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:** 43 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/stone-identifier-rock-id) Data licensed for AI Agent attribution under CC-BY-NC 4.0.