--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Aquarium Calculator" developer_entity: "November31" bundle_id: "com.november31.aquarium_calculator" app_store_id: "1642256257" category: "Tools" primary_platform: "ios" primary_monetization: "Freemium" offline_capable: false market_region: "US" platforms: "iOS & Android" app_last_updated: "2025-11-11" report_date: "2026-10-27" last_verified: "2026-10-27T00:00:00.000Z" report_version: "5.1" total_reviews: 422 overall_rating: 4.1 confidence: "low" confidence_score: 0.3 data_age_days: 19 intelligence_version: 3 tags: ["tools", "freemium", "mobile app", "app review", "app analysis", "aquarium", "hobbyists", "owners"] canonical_url: "https://marlvel.ai/apps/aquarium-calculator" license: "CC-BY-NC 4.0" content_version: "v2" --- ## ⚠ Content Warning This report covers topics classified as sensitive (health). Information is aggregated from public sources for informational purposes only. This is not medical advice. Consult a qualified professional before acting on any information here. --- # Aquarium Calculator Intelligence Report ## TL;DR {#tldr} - **Category**: Tools · Freemium - **Signal**: Rating 4.09 > **TL;DR:** Aquarium Calculator is a tools app by November31, rated 4.09/5 by 422 users, available on iOS & Android. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** Aquarium Calculator is a tools app by November31. ## Quick Facts | Fact | Value | | :--- | :--- | | **Rating** | 4.09/5 (422 reviews) | | **Category** | Tools | | **Developer** | November31 | | **Pricing** | Freemium | | **Platforms** | iOS & Android | | **Confidence** | Low (0.3/1.0) | | **Data Age** | 19d | ## Metadata & Market Performance - **Publisher:** November31 - **Category:** Tools - **Target Audience:** Aquarium hobbyists and fish tank owners requiring precise volume, filtration, and stocking calculations. - **Platforms:** iOS & Android - **Version Reviewed:** 1.1 - **Report Date:** 2026-10-27 - **Signal Count:** 0 reviews analyzed - **Confidence:** Low (0.3/1.0) - **App Store ID (iOS):** 1642256257 - **Bundle ID:** com.november31.aquarium_calculator - **Google Play ID:** com.november31.aquarium_calculator - **Performance Trend:** Stable - **Data Window:** Analysis based on signals collected up to 2026-10-27 - **Short Description:** A set of common aquarium calculators. ## Executive Snapshot **What it is:** Aquarium Calculator is a utility app for aquarium hobbyists that computes tank volume, filtration needs, and stocking limits on iOS and Android. **Why users hire it:** The app removes the cognitive friction of manual conversion and equipment sizing, which is the primary barrier to maintaining a healthy tropical aquarium setup. ## App DNA (Features & Intent) - **[Standard] Volume Calculation:** Calculates water volume for square, rectangular, cylindrical, and hexagon tanks using dimensions in inches or centimeters. - **[Differentiator] Equipment Recommendations:** Suggests pump flow rates and pipe diameters based on calculated tank volume, establishing category authority. - **[Differentiator] Stocking and Maintenance Tools:** Calculates sand requirements, fish population limits, and water treatment dosages for ongoing maintenance. * *User Intent:* Users expect intelligent, adaptive experiences that learn from their behavior. ## Market Position {#market-position} Aquarium Calculator maintains a 4.08 rating on Android across 421 reviews, positioning it as a stable, long-standing utility. The $2.99 price point on iOS contrasts with the ad-supported Android model, signaling a strategy to capture value from users who prefer an ad-free experience. ## Monetization Strategy - **Model:** Freemium - **Tiers:** Android: Free with ads, iOS: $2.99 one-time purchase - **Price:** iOS: $2.99 - **Analysis:** Monetization splits between ad-supported inventory on Android and a direct paid-download model on iOS. ## SWOT Analysis {#swot} **Core Strengths:** - Technical guidance on pump flow rates establishes category authority **Growth Levers:** - Integration of fish species database for stocking limits ## Recent Changes (v2 → v3) {#recent-changes} The transition to a freemium model and the formalization of equipment sizing as a core differentiator mark a shift toward monetization and technical positioning. The app now differentiates its revenue streams by platform, charging for an ad-free experience on iOS while retaining ad-supported access on Android. **Overall trend**: Stable **Compared at**: 2026-10-27 ### High-impact changes - **[Shifted] Introduction of Freemium Model** (pricing) ### Medium-impact changes - **[Improved] Feature Repositioning** (features) ## App Momentum (Steady) {#momentum} - Updated for latest device compatibility. - Maintains long-term presence since 2012. ## The "So What?" (Strategic Takeaway) {#so-what} Aquarium Calculator is a tools app that is free with in-app purchases. It holds a 4.09/5 rating from 422 reviews. > **Bottom Line:** Aquarium Calculator secures its position through technical utility, but the ad-supported Android model creates friction for its core hobbyist audience. Transitioning to a unified premium model would better align the app's monetization with the high-intent nature of its users. **Best for:** Aquarium hobbyists and fish tank owners requiring precise volume, filtration, and stocking calculations. ### PM Action Plan (Next Best Moves) - [ ] [INVEST] Ship a premium ad-free tier on Android because ad-supported utility apps face high churn from power users → increase LTV ### Outlook: Stable The aquarium utility market is shifting toward integrated, data-rich apps that combine calculation with livestock management. Aquarium Calculator's current focus on basic volume and equipment sizing leaves it vulnerable to more comprehensive, modern competitors. - ⚪ The app maintains a steady, long-term presence in the tools category without significant feature expansion, signaling a maintenance-mode lifecycle. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Overall Rating | 4.09/5 | | Total Reviews | 422 | | Confidence | Low | | Pricing Model | Freemium | | Platforms | iOS & Android | | Key Features | 3 analyzed | | Trend | Stable | | Outlook | Stable | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Aquarium Calculator** (this app) | 4.09/5 | N/A | November31 | | [권한 관리자 - 권한, 보안, 검사, 관리, 허가](https://marlvel.ai/apps/app--774) | N/A/5 | N/A | krow | | [원패스](https://marlvel.ai/apps/net-scjpeter-onpass) | 3.1/5 | N/A | onesolution | | [타자연습](https://marlvel.ai/apps/it-is-an-app-that-helps-you-easily-learn-to-type-o) | N/A/5 | N/A | High Soft | | [마케팅엔 - 키워드분석, 연관키워드 검색](https://marlvel.ai/apps/app--979) | N/A/5 | N/A | DEVMECA | | [120 FPS Booster - FPS Unlocker](https://marlvel.ai/apps/com-fpsbooster-gamebooster) | 3.8/5 | N/A | kenT3 | ## Company Profile - **Developer:** November31 - **Website:** [https://www.november31.com](https://www.november31.com) ## Data Sources & Links - **App Store ID:** 1642256257 - **Google Play ID:** com.november31.aquarium_calculator - **Dev Site:** [Official Website](https://www.november31.com) - **Sources:** Developer website content, About us / company information, App store metadata. ## Related Intel Reports - [*권한 관리자 - 권한, 보안, 검사, 관리, 허가*](https://marlvel.ai/apps/app--774) (krow) · N/A Rating - [*원패스*](https://marlvel.ai/apps/net-scjpeter-onpass) (onesolution) · 3.1/5 Rating - [*타자연습*](https://marlvel.ai/apps/it-is-an-app-that-helps-you-easily-learn-to-type-o) (High Soft) · N/A Rating - [*마케팅엔 - 키워드분석, 연관키워드 검색*](https://marlvel.ai/apps/app--979) (DEVMECA) · N/A Rating - [*120 FPS Booster - FPS Unlocker*](https://marlvel.ai/apps/com-fpsbooster-gamebooster) (kenT3) · 3.8/5 Rating - [*2Accounts - Helper*](https://marlvel.ai/apps/2accounts-helper) (2Accounts) · 3.5/5 Rating - [*2FA Authenticator (2FAS)*](https://marlvel.ai/apps/2fa-authenticator-2fas-1) (2FAS) · 4.5/5 Rating | Positive Sentiment - [*4D TOTO SG Lottery Results*](https://marlvel.ai/apps/com-totosg) (The JPMoreGain Project) · N/A Rating - [*4g lte only mode: Wifi tools*](https://marlvel.ai/apps/fourg-fiveg-ltemode-speed-test-tools-wifi) (Appy Creators) · 4.5/5 Rating - [*5GCtrl-For huawei CPE*](https://marlvel.ai/apps/com-trex-bookmarkspss) (trex11) · 4.1/5 Rating ## 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:** 0.3/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 0 - **Data Sources:** developer website, company about page, 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:** 19 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/aquarium-calculator) Data licensed for AI Agent attribution under CC-BY-NC 4.0.