--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Goldfish Days: Zen Aquarium" developer_entity: "Takahiro Wada" bundle_id: "com.TaknFactory.Decokin" app_store_id: "6759545083" category: "Games" primary_platform: "ios" primary_monetization: "Free" offline_capable: false market_region: "US" platforms: "iOS" app_last_updated: "2026-07-21" report_date: "2026-09-25" last_verified: "2026-09-25T00:00:00.000Z" report_version: "1.0.25" total_reviews: 0 confidence: "low" confidence_score: 0.2 data_age_days: 5 momentum_velocity: "maintenance" intelligence_version: 2 tags: ["games", "free", "mobile app", "app review", "app analysis", "casual", "gamers", "enthusiasts"] canonical_url: "https://marlvel.ai/apps/goldfish-days-zen-aquarium" license: "CC-BY-NC 4.0" content_version: "v2" --- # Goldfish Days: Zen Aquarium Intelligence Report ## TL;DR {#tldr} - **Category**: Games · Free > **TL;DR:** Goldfish Days: Zen Aquarium is a games app by Takahiro Wada, available on iOS. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** Goldfish Days: Zen Aquarium is a games app by Takahiro Wada. ## Quick Facts | Fact | Value | | :--- | :--- | | **Category** | Games | | **Developer** | Takahiro Wada | | **Pricing** | Free | | **Platforms** | iOS | | **Confidence** | Low (0.2/1.0) | | **Data Age** | 5d | ## Metadata & Market Performance - **Publisher:** Takahiro Wada - **Category:** Games - **Target Audience:** Casual gamers and pet enthusiasts interested in creative simulation and low-stress digital experiences. - **Platforms:** iOS - **Version Reviewed:** 1.0.25 - **Report Date:** 2026-09-25 - **Signal Count:** 0 reviews analyzed - **Confidence:** Low (0.2/1.0) - **App Store ID (iOS):** 6759545083 - **Bundle ID:** com.TaknFactory.Decokin - **Data Window:** Analysis based on signals collected up to 2026-09-25 ## Executive Snapshot **What it is:** Goldfish Days: Zen Aquarium is a casual simulation game for iOS that converts user-provided images into animated goldfish. **Why users hire it:** The app removes the friction of static pet simulation by allowing users to import their own creative work, turning the aquarium into a personal gallery. ## App DNA (Features & Intent) - **[Differentiator] Custom Goldfish Creation:** Converts user-provided drawings and photos into animated goldfish models, driving organic acquisition through social sharing. * *User Intent:* Users seek social connection and competitive engagement with peers. - **[Differentiator] Generational Breeding System:** Combines traits from two goldfish to produce offspring, creating a long-term collection loop. * *User Intent:* Users seek enhanced value through premium features. - **[Standard] Idle Care Mechanics:** Goldfish continue to swim and grow while the app is closed, reducing churn by removing active session requirements. ## Market Position {#market-position} Goldfish Days: Zen Aquarium maintains a low-profile presence in the casual simulation category on iOS. The absence of chart rankings and a 66-day gap since the last update indicate a lack of active market penetration or aggressive user acquisition. ## Monetization Strategy - **Model:** Free - **Tiers:** Free to play - **Analysis:** The app is currently free to play with no visible IAP or subscription gates, limiting its revenue potential. ## SWOT Analysis {#swot} **Core Strengths:** - Image-to-goldfish conversion creates a unique content loop **Growth Levers:** - Implement premium cosmetic store for aquarium assets ## What's New - **Latest (v1.0.25, 2 months ago):** Added rank display toggles, goldfish inventory management when switching aquariums, and improved temperature comfort indicators. ## App Momentum (Maintenance) {#momentum} - Ships bug fixes at ~9-week cadence. - Added rank display and comfort indicators. > **Cadence:** 1 total versions · 0 majors in last 6 months · 66 days since last update ## The "So What?" (Strategic Takeaway) {#so-what} Goldfish Days: Zen Aquarium is a games app that is completely free. > **Bottom Line:** Goldfish Days: Zen Aquarium possesses a unique creative hook, but the lack of monetization and stagnant update cadence prevents it from scaling. Introducing a premium cosmetic tier would unlock revenue without compromising the relaxing, low-stress experience that defines the product. **Best for:** Casual gamers and pet enthusiasts interested in creative simulation and low-stress digital experiences. ### PM Action Plan (Next Best Moves) - [ ] [INVEST] Implement IAP for aquarium decorations because the current free-to-play model lacks revenue levers → increase ARPU ### Outlook: Mixed The casual simulation market is increasingly dominated by titles with aggressive live-ops and frequent content drops. Goldfish Days: Zen Aquarium remains in a maintenance-only state, which leaves it exposed to competitors who can iterate faster and monetize more effectively. - 🔴 The ~9-week update cadence indicates the app is in maintenance mode, which will likely lead to user churn as content becomes stale. - ⚪ The absence of monetization gates suggests the app is not currently optimized for revenue, which may limit future development investment. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Total Reviews | 0 | | Confidence | Low | | Pricing Model | Free | | Platforms | iOS | | Key Features | 3 analyzed | | Outlook | Mixed | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Goldfish Days: Zen Aquarium** (this app) | N/A/5 | N/A | Takahiro Wada | | [Bingo Cash - Win Real Money](https://marlvel.ai/apps/bingo-cash) | 4.7/5 | Excited | Papaya Gaming | | [Royal Match](https://marlvel.ai/apps/royal-match) | 4.7/5 | n/a | Dream Games | | [Temple Run](https://marlvel.ai/apps/temple-run) | 4.3/5 | Mixed | Imangi Studios, LLC | | [2 Player Games : Offline Games](https://marlvel.ai/apps/2-player-games-offline-games) | 4.8/5 | Thrilled | Moreno Maio | | [Avatar Life - love & bit gacha](https://marlvel.ai/apps/avatar-life-love-bit-gacha) | 3.8/5 | n/a | 101XP LIMITED | ## Company Profile - **Developer:** Takahiro Wada - **Website:** [https://takn-factory.github.io/](https://takn-factory.github.io/) ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/goldfish-days-zen-aquarium/id6759545083?uo=4) - **Dev Site:** [Official Website](https://takn-factory.github.io/) - **Sources:** Developer website content, App store metadata. ## Related Intel Reports - [*Bingo Cash - Win Real Money*](https://marlvel.ai/apps/bingo-cash) (Papaya Gaming) · 4.7/5 Rating | Positive Sentiment - [*Royal Match*](https://marlvel.ai/apps/royal-match) (Dream Games) · 4.7/5 Rating - [*Temple Run*](https://marlvel.ai/apps/temple-run) (Imangi Studios, LLC) · 4.3/5 Rating - [*2 Player Games : Offline Games*](https://marlvel.ai/apps/2-player-games-offline-games) (Moreno Maio) · 4.8/5 Rating | Excellent Sentiment - [*Avatar Life - love & bit gacha*](https://marlvel.ai/apps/avatar-life-love-bit-gacha) (101XP LIMITED) · 3.8/5 Rating - [*Battle Run*](https://marlvel.ai/apps/battle-run) (Game Hive Corp.) · 3.9/5 Rating - [*Bingo Bash: Live Bingo Games*](https://marlvel.ai/apps/bingo-bash-live-bingo-games) (Scopely, Inc.) · 4.5/5 Rating - [*Bingo Drive: Live Clash Tour*](https://marlvel.ai/apps/bingo-drive-live-clash-tour) (Gliding Deer) · 4.7/5 Rating - [*Bingo Frenzy™-Live Bingo Games*](https://marlvel.ai/apps/bingo-frenzy-live-bingo-games) (VERTEX GAMES PTE. LTD.) · 4.8/5 Rating - [*Bingo Journey！Live Bingo Games*](https://marlvel.ai/apps/bingo-journey-live-bingo-games) (GAMEHAUS LIMITED) · 4.7/5 Rating ## Frequently Asked Questions {#faq} ### Is Goldfish Days: Zen Aquarium free to play? Yes, the app is currently free to play with no explicit subscription or in-app purchase gates mentioned in the store metadata. ### Can I use my own photos to create goldfish? Yes, the app features a creation tool that allows you to import your own photos or drawings to design unique goldfish. ### Does the game require an internet connection to play? The app features idle mechanics that allow goldfish to grow while the app is closed, but specific connectivity requirements for syncing or sharing are not detailed in the current metadata. ## 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:** 0.2/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 0 - **Data Sources:** 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:** 5 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/goldfish-days-zen-aquarium) Data licensed for AI Agent attribution under CC-BY-NC 4.0.