--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Sea Fantasy" developer_entity: "YOSHIYUKI NAKASHIMA" bundle_id: "com.YSK.SF" app_store_id: "6753211881" category: "Games" primary_platform: "ios" primary_monetization: "Paid" offline_capable: false market_region: "US" platforms: "iOS & Android" app_last_updated: "2026-04-23" report_date: "2026-04-27" report_version: "1.0.10" total_reviews: 20 overall_rating: 4.9 confidence: "low" confidence_score: 0.2 data_age_days: 66 intelligence_version: 2 tags: ["games", "paid", "mobile app", "app review", "app analysis", "retro-style", "enjoy", "fishing"] canonical_url: "https://marlvel.ai/apps/com-ysk-sf" license: "CC-BY-NC 4.0" last_verified: "2026-04-27T13:30:00.661Z" --- # Sea Fantasy App Audit > **TL;DR:** Sea Fantasy is a games app by YOSHIYUKI NAKASHIMA, rated 4.9/5 by 20 users, available on iOS & Android. > > **Marlvel.ai App Intelligence** — Independent analysis. US Market. No publisher influence. > **Key Insight:** Sea Fantasy is a games app by YOSHIYUKI NAKASHIMA. ## Quick Facts | Fact | Value | | :--- | :--- | | **Rating** | 4.9/5 (20 reviews) | | **Category** | Games | | **Developer** | YOSHIYUKI NAKASHIMA | | **Pricing** | Paid | | **Platforms** | iOS & Android | | **Confidence** | Low (0.2/1.0) | | **Data Age** | 66d | ## Metadata & Market Performance - **Publisher:** YOSHIYUKI NAKASHIMA - **Category:** Games - **Target Audience:** Fans of retro-style RPGs who enjoy fishing mechanics and crafting-based progression systems. - **Platforms:** iOS & Android - **Version Audited:** 1.0.10 - **Audit Date:** 2026-04-27 - **Signal Count:** 1 reviews analyzed - **Confidence:** Low (0.2/1.0) - **App Store ID (iOS):** 6753211881 - **Bundle ID:** com.YSK.SF - **Google Play ID:** com.YSK.SF - **Data Window:** Analysis based on signals collected up to 2026-04-27 - **Short Description:** This is not a peaceful fishing game. The end of the world is approaching... ## Executive Snapshot Sea Fantasy is a premium RPG that combines narrative-driven exploration with a fishing-based combat system. Players catch mysterious marine organisms known as Sea'Az to gather materials for crafting specialized fishing gear. ## App DNA (Features & Intent) - **[Standard] Sea'Az Fishing:** Players engage in a Gauge Action mechanic to catch various marine organisms with unique difficulty gimmicks. - **[Standard] Crafting System:** Materials harvested from caught Sea'Az are used to forge upgraded fishing rods and hooks. * *User Intent:* Users want to accelerate progress or gain temporary advantages. - **[Standard] Boat Exploration:** The game features a narrative-driven progression system that unlocks a ship for free-roaming exploration. * *User Intent:* Users seek enhanced value through premium features. ## Monetization Strategy - **Model:** Paid - **Price:** iOS: $6.99 | Android: $6.99 ## The "So What?" (Strategic Takeaway) Sea Fantasy is an established games app that is a paid app. With a 4.9/5 rating from 20 reviews, it shows polarized user reception. > **Bottom Line:** This is a niche, paid RPG experience that focuses on fishing mechanics and equipment crafting within a fantasy setting. **Best for:** Fans of retro-style RPGs who enjoy fishing mechanics and crafting-based progression systems. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Overall Rating | 4.9/5 | | Total Reviews | 20 | | Confidence | Low | | Pricing Model | Paid | | Platforms | iOS & Android | | Key Features | 3 analyzed | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Sea Fantasy** (this app) | 4.9/5 | N/A | YOSHIYUKI NAKASHIMA | | [Royal Match](https://marlvel.ai/apps/royal-match) | 4.7/5 | Excited | Dream Games | | [Temple Run](https://marlvel.ai/apps/temple-run) | 4.3/5 | Excited | Imangi Studios, LLC | | [Brawl Stars](https://marlvel.ai/apps/brawl-stars) | 4.5/5 | Excited | Supercell | | [Stumble Guys](https://marlvel.ai/apps/stumble-guys) | 4.5/5 | Mixed | Scopely, Inc. | | [Bejeweled Blitz](https://marlvel.ai/apps/bejeweled-blitz) | 3.3/5 | Frustrated | PopCap | ## Company Profile - **Developer:** YOSHIYUKI NAKASHIMA - **Website:** [https://x.com/SeaFantasy_EN](https://x.com/SeaFantasy_EN) - **Social:** [X/Twitter](https://twitter.com/privacy) ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/sea-fantasy/id6753211881?uo=2) - **Google Play:** [View on Google Play](https://play.google.com/store/apps/details?id=com.YSK.SF&hl=en&gl=us) - **Dev Site:** [Official Website](https://x.com/SeaFantasy_EN) - **Sources:** App store metadata, User reviews. ## Related Intel Reports - [*Royal Match*](https://marlvel.ai/apps/royal-match) (Dream Games) — 4.7/5 Rating | Positive Sentiment - [*Temple Run*](https://marlvel.ai/apps/temple-run) (Imangi Studios, LLC) — 4.3/5 Rating | Positive Sentiment - [*Brawl Stars*](https://marlvel.ai/apps/brawl-stars) (Supercell) — 4.5/5 Rating | Positive Sentiment - [*Stumble Guys*](https://marlvel.ai/apps/stumble-guys) (Scopely, Inc.) — 4.5/5 Rating | Mixed Sentiment - [*Bejeweled Blitz*](https://marlvel.ai/apps/bejeweled-blitz) (PopCap) — 3.3/5 Rating | Negative Sentiment - [*YouRiding - Surf and Bodyboard*](https://marlvel.ai/apps/youriding-surf-and-bodyboard) (BoardScore, Inc.) — 4.2/5 Rating | Mixed Sentiment - [*Hole.io*](https://marlvel.ai/apps/hole-io) (Voodoo) — 3.8/5 Rating | Terrible Sentiment - [*Archero*](https://marlvel.ai/apps/archero) (HABBY) — 4.5/5 Rating | Mixed Sentiment - [*Partymasters - Fun Idle Game*](https://marlvel.ai/apps/partymasters-fun-idle-game) (AI Games FZ) — 4.5/5 Rating | Positive Sentiment - [*True Surf*](https://marlvel.ai/apps/true-surf) (True Axis) — 4.0/5 Rating | Mixed 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:** 0.2/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 1 - **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:** 66 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/com-ysk-sf) Data licensed for AI Agent attribution under CC-BY-NC 4.0.