--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Reef Tank Guides" developer_entity: "Wontae Lee" bundle_id: "lwt.oneapp.reeftankguide" app_store_id: "6747474677" google_play_id: "lwt.oneapp.reef_tank_guide3" category: "Productivity" primary_platform: "ios" primary_monetization: "Free" offline_capable: false market_region: "US" platforms: "iOS & Android" app_last_updated: "2026-05-05" report_date: "2026-05-13" last_verified: "2026-05-13T17:59:20.351Z" report_version: "2.1.5" total_reviews: 0 confidence: "low" confidence_score: 0.2 data_age_days: 3 momentum_velocity: "maintenance" intelligence_version: 3 nemesis: "Fish Tank Buddy" competitor_count: 5 tags: ["productivity", "free", "mobile app", "app review", "app analysis", "marine", "coral", "hobbyists"] canonical_url: "https://marlvel.ai/intel-report/productivity/reef-tank-guides" license: "CC-BY-NC 4.0" content_version: "v2" --- # Reef Tank Guides App Audit ## TL;DR {#tldr} - **Category**: Productivity · Free > **TL;DR:** Reef Tank Guides is a productivity app by Wontae Lee, available on iOS & Android. > > **Marlvel.ai App Intelligence** — Independent analysis. US Market. No publisher influence. > **Key Insight:** Reef Tank Guides is a productivity app by Wontae Lee. ## Quick Facts | Fact | Value | | :--- | :--- | | **Category** | Productivity | | **Developer** | Wontae Lee | | **Pricing** | Free | | **Platforms** | iOS & Android | | **Confidence** | Low (0.2/1.0) | | **Data Age** | 0d | ## Metadata & Market Performance - **Publisher:** Wontae Lee - **Category:** Productivity - **Target Audience:** Marine fish and coral hobbyists who need technical guidance for tank maintenance and livestock management. - **Platforms:** iOS & Android - **Version Audited:** 2.1.5 - **Audit Date:** 2026-05-13 - **Signal Count:** 0 reviews analyzed - **Confidence:** Low (0.2/1.0) - **App Store ID (iOS):** 6747474677 - **Bundle ID:** lwt.oneapp.reeftankguide - **Google Play ID:** lwt.oneapp.reef_tank_guide3 - **Performance Trend:** Mixed - **Data Window:** Analysis based on signals collected up to 2026-05-13 ## Executive Snapshot **What it is:** Reef Tank Guides is a productivity app for marine aquarium hobbyists that provides livestock and lighting calculations. **Why users hire it:** Users hire the app to mitigate the risk of ecosystem failure through precise hardware and biological capacity math, replacing manual estimation with automated verification. ## App DNA (Features & Intent) - **[Differentiator] Livestock Calculation:** Calculates optimal marine fish capacity for specific tank volumes to prevent overstocking - **[Standard] Equipment Configuration Check:** Verifies if tank hardware settings align with marine environment requirements - **[Differentiator] PAR Level Monitoring:** Tracks Photosynthetically Active Radiation levels required for coral health * *User Intent:* Users want visibility into their own performance and progress. ## Market Position {#market-position} The app serves a specialized productivity niche for reef keepers, focusing on technical calculation over the social or logbook features that define the broader aquarium utility category. ## Monetization Strategy - **Model:** Free - **Tiers:** Free access to all calculation tools - **Analysis:** The app is currently free to use and monetizes through ad-supported inventory. ## SWOT Analysis {#swot} **Core Strengths:** - Specialized PAR level calculation for coral health - Marine-specific livestock compatibility logic **Critical Frictions:** - No maintenance reminder system - Lacks chemical dosing calculators - No user-facing logbook functionality **Growth Levers:** - Develop B2B partnerships with coral retailers - Integrate wearable sensor data for monitoring **Market Threats:** - Fish Tank Log's AI-driven assistant cadence - Fish Tank Buddy's established user trust ## Recent Changes (v2 → v3) {#recent-changes} The competitive landscape has been re-evaluated to focus on retention-oriented rivals, prompting a strategic shift toward maintenance and tracking features. **Overall trend**: Mixed **Compared at**: 2026-05-13 ### High-impact changes - **[Shifted] Competitive Nemesis Update** (positioning) — Primary nemesis changed from Aquarimate to Fish Tank Buddy, reflecting a shift in direct feature-set competition. ### Medium-impact changes - **[Added] Expanded Weakness and Threat Profile** (swot) — Added specific weaknesses regarding maintenance reminders and chemical dosing, and identified AI-driven competitors as new threats. - **[Added] Feature Gap Identification** (features) — Explicitly identified gaps in Bicarbonate Calculators, measurement converters, and AI-driven assistance compared to new market rivals. ## Rivals Landscape {#rivals} > Competitive positioning identified by AI analysis of app features, category, and market signals. ### Reef Tank Guides vs Fish Tank Buddy — Head to Head - **[Fish Tank Buddy](https://marlvel.ai/intel-report/utilities/fish-tank-buddy)** by harry bloch: This app directly competes by offering specialized aquarium calculators and maintenance tracking, mirroring the core utility value proposition of Reef Tank Guides. - **Key differences:** - Includes a dedicated Bicarbonate Calculator for chemical dosing which the target app currently lacks. - Provides a built-in measurement converter tool to assist users with international aquarium equipment standards. - Features a structured maintenance reminder system that keeps users engaged with routine tank upkeep tasks. - **Where Reef Tank Guides wins:** - ✅ Focuses specifically on PAR level calculations for coral health, a niche requirement for reef keepers. - ✅ Provides more comprehensive livestock compatibility logic to prevent ecosystem disasters in marine setups. - **Where Fish Tank Buddy wins:** - ❌ Offers a broader suite of general utility tools like measurement conversion and bicarbonate dosing. - ❌ Established presence with a higher rating, suggesting greater user trust in its calculation accuracy. - **Verdict:** The target app should pivot toward advanced reef-specific metrics like PAR and lighting intensity to differentiate from the general-purpose utility of this nemesis. ### Peers (What They Do Better) - **[Mango Exposure: The Calculator](https://marlvel.ai/intel-report/photo-video/mango-exposure-the-calculator)** by Mango Umbrella LLC: This app shares the 'Calculator' utility archetype, competing for the same 'Productivity' mindset, though it serves a different hobbyist vertical. - Specializes in photography-specific calculations like long exposure and depth of field for camera users. - Optimized specifically for the iOS ecosystem, providing a more polished native experience than cross-platform tools. - **[FishCare](https://marlvel.ai/intel-report/productivity/fishcare)** by 苏 王: This app targets the same aquarium enthusiast demographic by offering equipment control and alarm systems for fish and plant maintenance. - Includes direct aquarium equipment control features, allowing users to manage hardware settings within the app. - Features an automated alarm system to alert users of critical changes in their aquarium environment. - **[Dr.Trainer](https://marlvel.ai/intel-report/utilities/dr-trainer)** by HTT IMPORT AND EXPORT INC: While primarily for dog training, it occupies the same 'Utilities' category and competes for the user's attention regarding pet management and hardware configuration. - Provides specialized hardware configuration tools for smart bark collars, which is irrelevant to aquarium owners. - Uses a stimulation intensity control interface that is fundamentally different from marine tank management tools. - **[Fish Tank Log](https://marlvel.ai/intel-report/utilities/fish-tank-log)** by Toolit Media LLC: This app competes by providing a digital logbook and AI-driven assistance for aquarium management, overlapping with the target's goal of simplifying tank maintenance. - Integrates an AI aquarium assistant to provide real-time advice based on user-inputted water parameters. - Maintains a consistent release cadence with updates in the last month, signaling active product development. ## What's New - **Latest (v2.1.5, 1 weeks ago):** Fixed an issue with the tank menu. ## App Momentum (Maintenance) {#momentum} - Ships technical updates for hardware configuration. - Maintains free utility-first product model. > **Cadence:** 2 total versions · 0 majors in last 6 months · 7 days since last update · 16 days avg between updates ## The "So What?" (Strategic Takeaway) {#so-what} Reef Tank Guides is an established productivity app that is completely free. > **Bottom Line:** Reef Tank Guides provides high-precision technical tools for reef keepers, but the lack of recurring engagement features like maintenance logs leaves it exposed to logbook-style competitors, so the PM should prioritize building a retention loop to secure the user base. **Best for:** Marine fish and coral hobbyists who need technical guidance for tank maintenance and livestock management. ### PM Action Plan (Next Best Moves) - [ ] [INVEST] [HIGH IMPACT] Ship maintenance reminders because competitors use them to drive recurring engagement → increase daily active usage. — *Competitor analysis shows Fish Tank Buddy uses maintenance reminders to keep users engaged.* _(trade-off: deprioritize Push the PAR-level UI redesign to Q3 — reminder logic is a higher-frequency retention lever.)_ - [ ] [PIVOT] [HIGH IMPACT] Pivot to AI-driven water parameter tracking because Fish Tank Log uses this to build long-term retention → reduce churn to logbook-style rivals. — *Fish Tank Log successfully uses AI-driven assistance to overlap with the goal of simplifying maintenance.* _(trade-off: deprioritize Deprioritize the equipment configuration check update — tracking data is a stronger retention driver.)_ - [ ] [MAINTAIN] [MEDIUM IMPACT] Audit ad-inventory placement because the current free model lacks a premium tier → maximize revenue per user. — *The app is currently free and relies entirely on ad inventory for monetization.* _(trade-off: deprioritize Same-quarter capacity available — no major lever displaced.)_ ### Feature Gaps vs Competitors - Bicarbonate Calculator (available in Fish Tank Buddy) - Measurement converter tool (available in Fish Tank Buddy) - Maintenance reminder system (available in Fish Tank Buddy) - AI aquarium assistant (available in Fish Tank Log) ### Outlook: Stable The market for aquarium utilities is shifting toward integrated management systems that combine calculation with long-term tracking. Reef Tank Guides remains a static utility, which leaves it vulnerable to churn as users seek apps that provide a continuous record of tank health. - ⚪ The app maintains a steady focus on technical calculation tools, which avoids the feature bloat of competitors but limits growth potential. - 🔴 Competitors like Fish Tank Log are integrating AI-driven assistance, which threatens to pull users away from static calculation tools toward dynamic management. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Total Reviews | 0 | | Confidence | Low | | Pricing Model | Free | | Platforms | iOS & Android | | Key Features | 3 analyzed | | Trend | Mixed | | Outlook | Stable | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Reef Tank Guides** (this app) | N/A/5 | N/A | Wontae Lee | | [Dr.Trainer](https://marlvel.ai/intel-report/utilities/dr-trainer) | 2.2/5 | Upset | HTT IMPORT AND EXPORT INC | | [Mango Exposure: The Calculator](https://marlvel.ai/intel-report/photo-video/mango-exposure-the-calculator) | 5.0/5 | N/A | Mango Umbrella LLC | | [FishCare](https://marlvel.ai/intel-report/productivity/fishcare) | N/A/5 | Excited | 苏 王 | | [Fish Tank Log](https://marlvel.ai/intel-report/utilities/fish-tank-log) | 5.0/5 | Thrilled | Toolit Media LLC | | [Fish Tank Buddy](https://marlvel.ai/intel-report/utilities/fish-tank-buddy) | 5.0/5 | N/A | harry bloch | ## Company Profile - **Developer:** Wontae Lee - **Website:** [https://oneapp-e25c3.firebaseapp.com/](https://oneapp-e25c3.firebaseapp.com/) ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/reef-tank-guides/id6747474677?uo=4) - **Google Play:** [View on Google Play](https://play.google.com/store/apps/details?id=lwt.oneapp.reef_tank_guide3&hl=en&gl=us) - **Dev Site:** [Official Website](https://oneapp-e25c3.firebaseapp.com/) - **Sources:** Developer website content, App store metadata. ## Related Intel Reports - [*Dr.Trainer*](https://marlvel.ai/intel-report/utilities/dr-trainer) (HTT IMPORT AND EXPORT INC) — 2.2/5 Rating | Terrible Sentiment - [*Mango Exposure: The Calculator*](https://marlvel.ai/intel-report/photo-video/mango-exposure-the-calculator) (Mango Umbrella LLC) — 5.0/5 Rating | N/A Sentiment - [*FishCare*](https://marlvel.ai/intel-report/productivity/fishcare) (苏 王) — N/A Rating | Positive Sentiment - [*Fish Tank Log*](https://marlvel.ai/intel-report/utilities/fish-tank-log) (Toolit Media LLC) — 5.0/5 Rating | Excellent Sentiment - [*Fish Tank Buddy*](https://marlvel.ai/intel-report/utilities/fish-tank-buddy) (harry bloch) — 5.0/5 Rating | N/A Sentiment - [*Mitsu: AI Life Coach*](https://marlvel.ai/intel-report/productivity/mitsu-ai-life-coach) (C2 Insights) — N/A Rating | N/A Sentiment - [*ChatGPT*](https://marlvel.ai/intel-report/productivity/chatgpt) (OpenAI OpCo, LLC) — 4.8/5 Rating | Negative Sentiment - [*Pattrn - Discipline Tracker*](https://marlvel.ai/intel-report/productivity/pattrn-discipline-tracker) (Pedro Schott) — 4.8/5 Rating | Positive Sentiment - [*Today I Done: Habit Tracker*](https://marlvel.ai/intel-report/productivity/today-i-done-habit-tracker) (Shriansh Shrivastava) — 4.3/5 Rating | N/A Sentiment - [*Zoho Show: Presentation Maker*](https://marlvel.ai/intel-report/productivity/zoho-show-presentation-maker) (Zoho Corporation) — 4.2/5 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:** 0.2/1.0 (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:** 0 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/intel-report/productivity/reef-tank-guides) Data licensed for AI Agent attribution under CC-BY-NC 4.0.