--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Sudoku Clean - No Ads" developer_entity: "哲庆 史" bundle_id: "com.perry.sudoku" app_store_id: "6739777600" category: "Entertainment" primary_platform: "ios" primary_monetization: "Free" offline_capable: false market_region: "US" platforms: "iOS" app_last_updated: "2026-05-07" report_date: "2026-05-14" last_verified: "2026-05-14T13:45:38.438Z" report_version: "2.1.1" total_reviews: 25 overall_rating: 4.4 sentiment: "Thrilled" sentiment_score: 90 confidence: "low" confidence_score: 0.45 top_praise_theme: "Prime number integration adds strategic depth to the classic Sudoku logic puzzle experience" review_sample_size: 25 total_review_count: 2 analyzed_review_count: 2 data_age_days: 40 momentum_velocity: "active" intelligence_version: 3 nemesis: "Sudoku.com - Number Games" competitor_count: 5 tags: ["entertainment", "free", "thrilled sentiment", "mobile app", "app review", "app analysis", "sudoku", "enthusiasts", "puzzle"] canonical_url: "https://marlvel.ai/intel-report/entertainment/com-perry-sudoku" license: "CC-BY-NC 4.0" content_version: "v2" --- # Sudoku Clean - No Ads App Audit ## TL;DR {#tldr} - **Category**: Entertainment · Free - **Signal**: Rating 4.4 · Sentiment Thrilled - **Recent focus**: Prime number integration adds strategic depth to the classic Sudoku logic puzzle experience (top praise) > **TL;DR:** Sudoku Clean - No Ads is a entertainment app by 哲庆 史, rated 4.4/5 by 25 users, with Thrilled user sentiment (90/100), available on iOS. > > **Marlvel.ai App Intelligence** — Independent analysis. US Market. No publisher influence. > **Key Insight:** Sudoku Clean - No Ads maintains Thrilled user sentiment (4.4/5 from 25 reviews), with users consistently praising prime number integration adds strategic depth to the classic sudoku logic puzzle experience. ## Quick Facts | Fact | Value | | :--- | :--- | | **Rating** | 4.4/5 (25 reviews) | | **User Mood** | Thrilled | | **Category** | Entertainment | | **Developer** | 哲庆 史 | | **Pricing** | Free | | **Platforms** | iOS | | **Confidence** | Low (0.45/1.0) | | **Data Age** | 0d | ## Metadata & Market Performance - **Publisher:** 哲庆 史 - **Category:** Entertainment - **Target Audience:** Sudoku enthusiasts and puzzle solvers seeking a distraction-free environment to learn advanced solving techniques. - **Platforms:** iOS - **Version Audited:** 2.1.1 - **Audit Date:** 2026-05-14 - **Signal Count:** 2 reviews analyzed - **Confidence:** Low (0.45/1.0) - **App Store ID (iOS):** 6739777600 - **Bundle ID:** com.perry.sudoku - **Performance Trend:** Mixed - **Data Window:** Analysis based on signals collected up to 2026-05-14 ## Executive Snapshot **What it is:** Sudoku Clean is a logic-focused puzzle app for iOS that provides ad-free solving and educational technique guides. **Why users hire it:** Users hire this app to master Sudoku logic without the distraction of ads or the frustration of generic hint systems that simply reveal answers. ## App DNA (Features & Intent) - **[Differentiator] Logic-based Hint System:** Provides step-by-step explanations for puzzle moves rather than revealing answers * *User Intent:* Users seek enhanced value through premium features. - **[Differentiator] Advanced Technique Library:** Educational content covering fish, wings, chains, and uniqueness strategies * *User Intent:* Users expect intelligent, adaptive experiences that learn from their behavior. - **[Differentiator] Draw and Chain Analysis:** Visual tools for marking candidates and chaining logic on the grid * *User Intent:* Users expect intelligent, adaptive experiences that learn from their behavior. ## Market Position {#market-position} Sudoku Clean currently holds a #72 Paid rank in its category, signaling a niche entry strategy. The lack of grossing rank data suggests the current free-only model is not yet capturing revenue from its high-intent user base. ## Monetization Strategy - **Model:** Free - **Tiers:** Free access to all features and puzzle library - **Analysis:** The app currently operates as a free, ad-free utility with no visible IAP or subscription gates. ## 🟢 User Sentiment (Low Confidence: 2 of 2 reviews analyzed) {#user-sentiment} - **Overall Rating:** 4.4/5 - **Platform Split:** iOS 4.4/5 (25 ratings) - **Overall Sentiment:** Thrilled ### Top Praises - **Prime number integration adds strategic depth to the classic Sudoku logic puzzle experience** - **Challenging difficulty curve keeps puzzle enthusiasts engaged during long-form logic sessions** ## SWOT Analysis {#swot} **Core Strengths:** - Educational hint system builds long-term user skill - Ad-free interface lowers friction for serious solvers **Critical Frictions:** - No social leaderboards or tournaments - 25 total ratings indicate low market penetration **Growth Levers:** - Implement daily challenge streaks to drive retention - Add wearable integration for short-session play **Market Threats:** - Easybrain's daily challenge ecosystem dominates retention - Ad-heavy competitors have higher acquisition budgets ## Recent Changes (v2 → v3) {#recent-changes} The app has refined its market position as an educational Sudoku tool while identifying critical gaps in retention and monetization compared to industry leaders. **Overall trend**: Mixed **Compared at**: 2026-05-14 ### High-impact changes - **[Shifted] Educational Focus** (positioning) — Positioning shifted from a general ad-free utility to a specialized tool for mastering advanced Sudoku logic and techniques. - **[Added] Retention Vulnerability** (swot) — New weakness identified: lack of social leaderboards and daily challenges creates a retention gap against competitors like Easybrain. ### Medium-impact changes - **[Improved] Hint System Upgrade** (features) — Hint system reclassified from 'standard' to 'differentiator' due to the addition of step-by-step logic explanations. - **[Added] Sentiment Data Expansion** (sentiment) — User sentiment data increased from 2 reviews to 25 reviews, establishing a 4.4 rating baseline. ## Rivals Landscape {#rivals} > Competitive positioning identified by AI analysis of app features, category, and market signals. ### Sudoku Clean - No Ads vs Sudoku.com - Number Games — Head to Head - **[Sudoku.com - Number Games](https://marlvel.ai/intel-report/games/sudoku-com-number-games)** by Easybrain Ltd: With over 1.8 million reviews and a high-frequency release cadence, this app defines the market standard for casual Sudoku players. - **Moat strength:** High — sustainable advantage over 12 months - **Key differences:** - Aggressive daily challenge ecosystem creates a persistent loop that keeps users returning every single day. - Massive library of curated content allows for granular difficulty scaling that exceeds basic logic-based hints. - High-frequency update cycle ensures the app remains compatible with the latest OS features and UI trends. - **Where Sudoku Clean - No Ads wins:** - ✅ Focus on educational logic-based hints provides a clearer path to skill mastery than generic hint systems. - ✅ Minimalist, ad-free positioning appeals to users fatigued by the aggressive monetization found in mass-market apps. - **Where Sudoku.com - Number Games wins:** - ❌ Deep integration of social leaderboards and global tournaments drives high retention through competitive community engagement. - ❌ Extensive variety of game modes beyond standard Sudoku keeps the user experience fresh for long-term players. - **Verdict:** The target app must double down on its 'educational' value proposition to differentiate from the content-heavy, gamified experience of the market leader. ### Contenders (Strong Challengers) - **[Sudoku - Brain Puzzle Games](https://marlvel.ai/intel-report/games/sudoku-brain-puzzle-games)** by Oakever Games [Moat: Medium]: High user engagement and consistent update velocity make this a significant threat in the casual puzzle space. - Integrated puzzle solver functionality provides immediate utility for users stuck on difficult or external puzzles. - Optimized for rapid, short-session gameplay which captures the casual commuter audience effectively. - **[Sudoku :)](https://marlvel.ai/intel-report/games/sudoku-8)** by Maple Media Apps, LLC [Moat: Medium]: A long-standing presence in the category with a large, established user base and consistent maintenance. - Legacy brand recognition provides a stable baseline of organic downloads without heavy reliance on paid acquisition. - Refined, classic interface design appeals to purists who prefer a traditional, distraction-free Sudoku experience. ### Peers (What They Do Better) - **[Sudoku Color - Classic Puzzle!](https://marlvel.ai/intel-report/games/sudoku-color-classic-puzzle)** by MobilityWare: Introduces visual variety to the standard Sudoku formula, serving as a direct alternative for casual players. - Color-based mechanics provide a unique visual layer that differentiates the gameplay from standard monochrome grids. - Leverages established developer reputation to maintain high visibility within the crowded puzzle category. - **[Sudoku: Classic & Variations](https://marlvel.ai/intel-report/games/sudoku-classic-variations-1)** by Conceptis Ltd.: Targets the 'prosumer' segment by offering complex variations that appeal to advanced Sudoku enthusiasts. - Focuses on high-quality, hand-crafted puzzles rather than algorithmically generated grids, appealing to serious logic enthusiasts. - Includes a wide array of non-standard Sudoku variants that provide a deeper challenge than the target app. ## App Momentum (Active) {#momentum} - Ships stability and bug fix updates. - Maintains high-difficulty puzzle content focus. > **Cadence:** 5 total versions · 0 majors in last 6 months · 33 days since last update ## The "So What?" (Strategic Takeaway) {#so-what} Sudoku Clean - No Ads is a market-leading entertainment app that is completely free. With a 4.4/5 rating from 25 reviews, it delivers strong user satisfaction. > **Bottom Line:** Sudoku Clean succeeds as a pure educational tool, but its lack of social or recurring engagement loops leaves it vulnerable to churn, so the PM must prioritize a daily challenge system to compete with market leaders. **Best for:** Sudoku enthusiasts and puzzle solvers seeking a distraction-free environment to learn advanced solving techniques. ### PM Action Plan (Next Best Moves) - [ ] [INVEST] [HIGH IMPACT] Ship daily challenge streaks because current retention lacks a recurring engagement loop → increase daily active users. — *Competitor analysis shows daily challenges are the primary retention mechanism for market leaders.* _(trade-off: deprioritize Pause the advanced technique library expansion — current content is sufficient for the existing user base.)_ - [ ] [PIVOT] [MEDIUM IMPACT] Audit monetization options because the current free-only model misses revenue from high-intent users → fund future acquisition. — *The app has no IAP or subscription gates despite a high-quality, niche product offering.* _(trade-off: deprioritize Same-quarter capacity available — no major lever displaced.)_ ### Feature Gaps vs Competitors - Social leaderboards (available in Sudoku.com but absent here) - Global tournaments (available in Sudoku.com but absent here) ### Outlook: Stable The casual puzzle market is consolidating around apps that offer persistent daily engagement loops, leaving pure utility apps like Sudoku Clean exposed. The PM must transition from a static utility to a live-service model to prevent user attrition to more gamified rivals. - 🟢 The high difficulty ceiling and prime number integration provide a unique value proposition that keeps core enthusiasts engaged. - 🔴 The absence of social features and daily challenges creates a retention gap that allows competitors to siphon off casual players. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Overall Rating | 4.4/5 | | Total Reviews | 25 | | Sentiment | Thrilled (90/100) | | Confidence | Low | | Pricing Model | Free | | Platforms | iOS | | Key Features | 3 analyzed | | Trend | Mixed | | Outlook | Stable | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Sudoku Clean - No Ads** (this app) | 4.4/5 | Thrilled | 哲庆 史 | | [Sudoku.com - Number Games](https://marlvel.ai/intel-report/games/sudoku-com-number-games) | 4.8/5 | Frustrated | Easybrain Ltd | | [Sudoku - Brain Puzzle Games](https://marlvel.ai/intel-report/games/sudoku-brain-puzzle-games) | 4.8/5 | Mixed | Oakever Games | | [Sudoku Color - Classic Puzzle!](https://marlvel.ai/intel-report/games/sudoku-color-classic-puzzle) | 4.8/5 | Mixed | MobilityWare | | [Sudoku :)](https://marlvel.ai/intel-report/games/sudoku-8) | 4.7/5 | N/A | Maple Media Apps, LLC | | [Sudoku: Classic & Variations](https://marlvel.ai/intel-report/games/sudoku-classic-variations-1) | 4.8/5 | N/A | Conceptis Ltd. | ## Company Profile - **Developer:** 哲庆 史 - **Website:** [https://sudokuclean.com](https://sudokuclean.com) ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/sudoku-clean-no-ads/id6739777600?uo=2) - **Dev Site:** [Official Website](https://sudokuclean.com) - **Sources:** Developer website content, App store metadata, User reviews. ## Related Intel Reports - [*Sudoku.com - Number Games*](https://marlvel.ai/intel-report/games/sudoku-com-number-games) (Easybrain Ltd) — 4.8/5 Rating | Negative Sentiment - [*Sudoku - Brain Puzzle Games*](https://marlvel.ai/intel-report/games/sudoku-brain-puzzle-games) (Oakever Games) — 4.8/5 Rating | Mixed Sentiment - [*Sudoku Color - Classic Puzzle!*](https://marlvel.ai/intel-report/games/sudoku-color-classic-puzzle) (MobilityWare) — 4.8/5 Rating | Mixed Sentiment - [*Sudoku :)*](https://marlvel.ai/intel-report/games/sudoku-8) (Maple Media Apps, LLC) — 4.7/5 Rating | N/A Sentiment - [*Sudoku: Classic & Variations*](https://marlvel.ai/intel-report/games/sudoku-classic-variations-1) (Conceptis Ltd.) — 4.8/5 Rating | N/A Sentiment - [*BESTPLAY Play to earn & donate*](https://marlvel.ai/intel-report/entertainment/bestplay-play-to-earn-donate) (Bestplay) — 4.7/5 Rating | N/A Sentiment - [*TikTok - Videos, Shop & LIVE*](https://marlvel.ai/intel-report/entertainment/tiktok-videos-shop-live) (TikTok Ltd.) — 4.4/5 Rating | Negative Sentiment - [*Leprecam*](https://marlvel.ai/intel-report/entertainment/leprecam) (Asinine Games Inc) — 4.2/5 Rating | Mixed Sentiment - [*JustPlay: Earn Money or Donate*](https://marlvel.ai/intel-report/entertainment/justplay-earn-money-or-donate) (JustPlay GmbH) — 4.4/5 Rating | Mixed Sentiment - [*JustPlay: Earn Loyalty Rewards*](https://marlvel.ai/intel-report/entertainment/justplay-earn-loyalty-rewards) (Gimica GmbH) — 4.7/5 Rating | Mixed Sentiment ## 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 and evidence quoting. 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:** 2 - **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:** 0 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/intel-report/entertainment/com-perry-sudoku) Data licensed for AI Agent attribution under CC-BY-NC 4.0.