--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Flow Test Calculator" developer_entity: "Larry Owens" bundle_id: "com.cookiejardevelopment.FlowTestCalculator" app_store_id: "853530759" category: "Productivity" primary_platform: "ios" primary_monetization: "Free" offline_capable: false market_region: "US" platforms: "iOS" app_last_updated: "2021-09-01" report_date: "2026-10-22" last_verified: "2026-10-22T00:00:00.000Z" report_version: "2.0" total_reviews: 63 overall_rating: 4.1 sentiment: "Mixed" sentiment_score: 45 confidence: "low" confidence_score: 0.35 top_praise_theme: "The core flow calculation tool provides a reliable and simple interface for field-based fire pump testing" top_complaint_theme: "The app fails to launch or display content correctly on current iOS versions following the latest update" review_sample_size: 15 total_review_count: 15 analyzed_review_count: 15 data_age_days: 15 momentum_velocity: "zombie" intelligence_version: 2 tags: ["productivity", "free", "mixed sentiment", "mobile app", "app review", "app analysis", "service", "personnel", "water"] canonical_url: "https://marlvel.ai/apps/flow-test-calculator" license: "CC-BY-NC 4.0" content_version: "v2" --- # Flow Test Calculator Intelligence Report ## TL;DR {#tldr} - **Category**: Productivity · Free - **Signal**: Rating 4.13 · Sentiment Mixed - **Recent focus**: The app fails to launch or display content correctly on current iOS versions following the latest update (top complaint) · The core flow calculation tool provides a reliable and simple interface for field-based fire pump testing (top praise) > **TL;DR:** Flow Test Calculator is a productivity app by Larry Owens, rated 4.13/5 by 63 users, with Mixed user sentiment (45/100), available on iOS. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** Flow Test Calculator shows Mixed sentiment (4.13/5 from 63 reviews) - users praise the core flow calculation tool provides a reliable and simple interface for field-based fire pump testing but report issues with the app fails to launch or display content correctly on current ios versions following the latest update. ## Quick Facts | Fact | Value | | :--- | :--- | | **Rating** | 4.13/5 (63 reviews) | | **User Mood** | Mixed | | **Category** | Productivity | | **Developer** | Larry Owens | | **Pricing** | Free | | **Platforms** | iOS | | **Confidence** | Low (0.35/1.0) | | **Data Age** | 15d | ## Metadata & Market Performance - **Publisher:** Larry Owens - **Category:** Productivity - **Target Audience:** Fire service personnel and water utility professionals requiring field-based hydraulic calculations. - **Platforms:** iOS - **Version Reviewed:** 2.0 - **Report Date:** 2026-10-22 - **Signal Count:** 15 reviews analyzed - **Confidence:** Low (0.35/1.0) - **App Store ID (iOS):** 853530759 - **Bundle ID:** com.cookiejardevelopment.FlowTestCalculator - **Data Window:** Analysis based on signals collected up to 2026-10-22 ## Executive Snapshot **What it is:** Flow Test Calculator is a specialized utility for fire service and water utility professionals to perform hydraulic calculations on iOS. **Why users hire it:** It replaces manual calculation sheets with a digital interface, removing the cognitive cost of field-based hydraulic math for hydrant testing. ## App DNA (Features & Intent) - **[Standard] Flow Rate Calculator:** Calculates hydrant flow rates using a standard variation of the Hazen-Williams formula. - **[Standard] System Capacity Analysis:** Determines the maximum flow available for a water system based on user-provided inputs. * *User Intent:* Users seek enhanced value through premium features. - **[Standard] Default Value Entry:** Allows users to save and pre-fill default numbers for recurring calculations, reducing friction for repeat professional use. * *User Intent:* Users seek enhanced value through premium features. ## Market Position {#market-position} Flow Test Calculator maintains a niche utility position with a 4.1-star rating across 63 total ratings. The five-year development gap limits its competitive standing against modern, cross-platform alternatives. ## Monetization Strategy - **Model:** Free - **Tiers:** Free - **Analysis:** The app is distributed as a free utility without visible monetization gates or subscription tiers. ## 🟡 User Sentiment (Low Confidence: 15 of 15 reviews analyzed) {#user-sentiment} - **Overall Rating:** 4.13/5 - **Platform Split:** iOS 4.1/5 (63 ratings) - **Overall Sentiment:** Mixed ### Top Praises - **The core flow calculation tool provides a reliable and simple interface for field-based fire pump testing** ### Top Complaints (Impact Areas) - **The app fails to launch or display content correctly on current iOS versions following the latest update** ## SWOT Analysis {#swot} **Core Strengths:** - Reliable Hazen-Williams calculation engine **Growth Levers:** - Automated pitot reading integration ## What's New - **Latest (v2.0, 5 years ago):** Introduced responsive layout support for multiple screen sizes and added a default number entry feature. ## App Momentum (Zombie) {#momentum} - No updates since September 2021 - Maintenance-mode status limits user growth > **Cadence:** 1 total versions · 1 majors in last 6 months · 1877 days since last update ## The "So What?" (Strategic Takeaway) {#so-what} Flow Test Calculator is a productivity app that is completely free. With a 4.13/5 rating from 63 reviews, it shows mixed user reception. > **Bottom Line:** Flow Test Calculator remains a reliable calculation tool, but the current launch failures on modern iOS versions render it unusable for many professionals. Addressing these stability regressions is the only way to restore its utility and prevent total user churn. **Best for:** Fire service personnel and water utility professionals requiring field-based hydraulic calculations. ### PM Action Plan (Next Best Moves) - [ ] [INVEST] Rebuild launch logic for current iOS versions because the app currently crashes for many users → restore basic utility ### Outlook: Declining The market for field-based utility tools is shifting toward cross-platform accessibility and integrated data workflows. Flow Test Calculator's lack of development and platform limitations leave it exposed to abandonment by professional users who require reliable, modern tools. - 🔴 Critical launch failures on modern iOS versions prevent core utility, which drives negative sentiment and user churn. - 🔴 The five-year development gap signals that Flow Test Calculator is in maintenance mode, leaving it vulnerable to newer, cross-platform competitors. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Overall Rating | 4.13/5 | | Total Reviews | 63 | | Sentiment | Mixed (45/100) | | Confidence | Low | | Pricing Model | Free | | Platforms | iOS | | Key Features | 3 analyzed | | Outlook | Declining | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Flow Test Calculator** (this app) | 4.13/5 | Mixed | Larry Owens | | [HitWave](https://marlvel.ai/apps/ciendor-applications-hitwave) | 2.5/5 | Mixed | Ciendor Holdings Corp. LTD | | [ChatGPT](https://marlvel.ai/apps/chatgpt) | 4.8/5 | n/a | OpenAI OpCo, LLC | | [VPN 360: Fast & Secure Proxy](https://marlvel.ai/apps/co-infinitysoft-vpn360) | 4.5/5 | Mixed | Pango GmbH | | [VPN - Super Unlimited Proxy](https://marlvel.ai/apps/vpn-super-unlimited-proxy) | 4.7/5 | Thrilled | Mobile Jump Pte Ltd | | [Bookmarks - Send To Self](https://marlvel.ai/apps/bookmarks-send-to-self) | 4.4/5 | Excited | GILI | ## Company Profile - **Developer:** Larry Owens ## Data Sources & Links - **App Store ID:** 853530759 - **Sources:** App store metadata, User reviews. ## Related Intel Reports - [*HitWave*](https://marlvel.ai/apps/ciendor-applications-hitwave) (Ciendor Holdings Corp. LTD) · 2.5/5 Rating - [*ChatGPT*](https://marlvel.ai/apps/chatgpt) (OpenAI OpCo, LLC) · 4.8/5 Rating - [*VPN 360: Fast & Secure Proxy*](https://marlvel.ai/apps/co-infinitysoft-vpn360) (Pango GmbH) · 4.5/5 Rating - [*VPN - Super Unlimited Proxy*](https://marlvel.ai/apps/vpn-super-unlimited-proxy) (Mobile Jump Pte Ltd) · 4.7/5 Rating | Excellent Sentiment - [*Bookmarks - Send To Self*](https://marlvel.ai/apps/bookmarks-send-to-self) (GILI) · 4.4/5 Rating | Positive Sentiment - [*Clean Swell*](https://marlvel.ai/apps/clean-swell) (Ocean Conservancy) · 3.9/5 Rating - [*Data Tree Manager*](https://marlvel.ai/apps/data-tree-manager) (Vsevolod Migdisov) · N/A Rating - [*DoughLab - Baking Recipe Lab*](https://marlvel.ai/apps/doughlab-baking-recipe-lab) (Jeong-soo Park) · N/A Rating - [*Google Gemini*](https://marlvel.ai/apps/google-gemini-1) (Google LLC) · 4.6/5 Rating | Positive Sentiment - [*Infomaniak Euria*](https://marlvel.ai/apps/infomaniak-euria) (Infomaniak Network SA) · 4.8/5 Rating ## Frequently Asked Questions {#faq} ### Is Flow Test Calculator available on Android? No, Flow Test Calculator is currently only available on iOS, which is a frequent source of frustration for users who require cross-platform support. ### Does Flow Test Calculator work on the latest iOS versions? Users report that the app frequently crashes or fails to launch on recent iOS versions, making it unreliable for some users. ### Is Flow Test Calculator suitable for professional fire pump testing? Yes, the app is designed for fire service and water utility professionals, though current stability issues may impact its reliability in the field. ## 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:** 0.35/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 15 - **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:** 15 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/flow-test-calculator) Data licensed for AI Agent attribution under CC-BY-NC 4.0.