--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Brewing Calculator" developer_entity: "Bartosz Lampart" bundle_id: "com.swayko.brewingcalculator" app_store_id: "6756520418" google_play_id: "dev.lampart.bartosz.brewingcalculator" category: "Food & Drink" primary_platform: "ios" primary_monetization: "Free" offline_capable: true market_region: "US" platforms: "iOS & Android" app_last_updated: "2025-12-16" report_date: "2026-05-11" last_verified: "2026-05-11T00:00:00.000Z" report_version: "2.3.3" total_reviews: 180 overall_rating: 3.5 sentiment: "Mixed" sentiment_score: 55 confidence: "medium" confidence_score: 0.35 top_praise_theme: "Core brewing calculations provide reliable support for daily alcohol percentage and conversion tasks" top_complaint_theme: "Inaccurate gravity and conversion math leads to erroneous results for specific brewing ingredients" review_sample_size: 18 total_review_count: 18 analyzed_review_count: 18 data_age_days: 97 momentum_velocity: "zombie" intelligence_version: 4 competitor_count: 5 tags: ["food & drink", "free", "mixed sentiment", "mobile app", "app review", "app analysis", "homebrewers", "craft", "enthusiasts"] canonical_url: "https://marlvel.ai/apps/brewing-calculator" license: "CC-BY-NC 4.0" content_version: "v2" --- # Brewing Calculator Intelligence Report ## TL;DR {#tldr} - **Category**: Food & Drink · Free - **Signal**: Rating 3.5 · Sentiment Mixed - **Recent focus**: Inaccurate gravity and conversion math leads to erroneous results for specific brewing ingredients (top complaint) · Core brewing calculations provide reliable support for daily alcohol percentage and conversion tasks (top praise) > **TL;DR:** Brewing Calculator is a food & drink app by Bartosz Lampart, rated 3.5/5 by 180 users, with Mixed user sentiment (55/100), available on iOS & Android. > > **Marlvel.ai App Intelligence** — Independent analysis. US Market. No publisher influence. > **Key Insight:** Brewing Calculator shows Mixed sentiment (3.5/5 from 180 reviews) — users praise core brewing calculations provide reliable support for daily alcohol percentage and conversion tasks but report issues with inaccurate gravity and conversion math leads to erroneous results for specific brewing ingredients. ## Quick Facts | Fact | Value | | :--- | :--- | | **Rating** | 3.5/5 (180 reviews) | | **User Mood** | Mixed | | **Category** | Food & Drink | | **Developer** | Bartosz Lampart | | **Pricing** | Free | | **Platforms** | iOS & Android | | **Confidence** | Medium (0.35/1.0) | | **Data Age** | 97d | ## Metadata & Market Performance - **Publisher:** Bartosz Lampart - **Category:** Food & Drink - **Target Audience:** Homebrewers and craft beer enthusiasts requiring precise measurements for recipe formulation and brew day management. - **Platforms:** iOS & Android - **Version Reviewed:** 1.0 - **Report Date:** 2026-05-11 - **Signal Count:** 18 reviews analyzed - **Confidence:** Medium (0.35/1.0) - **App Store ID (iOS):** 6756520418 - **Bundle ID:** com.swayko.brewingcalculator - **Google Play ID:** dev.lampart.bartosz.brewingcalculator - **Performance Trend:** Mixed - **Data Window:** Analysis based on signals collected up to 2026-05-11 ## Executive Snapshot **What it is:** Brewing Calculator is a utility app for homebrewers providing gravity, alcohol, carbonation, yeast, and IBU calculations on iOS and Android. **Why users hire it:** Users hire this app to manage the mathematical complexity of craft beer production, relying on it for precise recipe formulation during the brew day. ## App DNA (Features & Intent) - **[Standard] Gravity Unit Converter:** Instant conversion between Specific Gravity, Plato, and Brix for recipe development. - **[Differentiator] Offline Functionality:** Calculations operate without an active internet connection. * *User Intent:* Users want uninterrupted access without internet dependency. - **[Differentiator] Ad-Free Experience:** The application provides tools without interstitial or banner advertisements. * *User Intent:* Users seek enhanced value through premium features. ## Market Position {#market-position} The app maintains a 3.5-star rating on Android with 180 total ratings, but the lack of recent feature updates leaves it vulnerable to specialized competitors. The absence of a paid tier limits revenue potential while the mathematical accuracy complaints stall growth in the precision-hobbyist segment. ## Monetization Strategy - **Model:** Free - **Tiers:** Free access to all calculation tools - **Analysis:** The app operates as a free utility with no subscription or IAP gates, relying on ad-inventory on the Android platform. ## 🟡 User Sentiment (Medium Confidence: 18 of 18 reviews analyzed) {#user-sentiment} - **Overall Rating:** 3.5/5 - **Platform Split:** Android 3.5/5 (180 ratings) - **Overall Sentiment:** Mixed ### Top Praises - **Core brewing calculations provide reliable support for daily alcohol percentage and conversion tasks** ### Top Complaints (Impact Areas) - **Inaccurate gravity and conversion math leads to erroneous results for specific brewing ingredients** ## SWOT Analysis {#swot} **Core Strengths:** - Offline-first architecture enables reliable brew-day access in environments without connectivity - Ad-free interface minimizes cognitive load during active brewing sessions **Growth Levers:** - Hydrometer temperature correction tool would address a high-frequency user request - Integration of a recipe-logging diary would increase session frequency ## Recent Changes (v3 → v4) {#recent-changes} The product assessment shifted from a focus on feature stagnation to a focus on core utility failure due to identified mathematical inaccuracies. **Overall trend**: Mixed **Compared at**: 2026-05-11 ### High-impact changes - **[Declined] Emergence of Critical Math Complaints** (sentiment) - **[Added] Mathematical Inaccuracy Weakness** (swot) ### Medium-impact changes - **[Shifted] Review Count Correction** (sentiment) - **[Shifted] Outlook Trend Adjustment** (outlook) ## What's New - **Latest (v2.3.3, 2 years ago):** Technical update: SDK upgraded. ## App Momentum (Zombie) {#momentum} - Upgraded SDK in latest Android release - Maintained ad-free utility model > **Cadence:** 2 total versions · 0 majors in last 6 months · 146 days since last update · 671 days avg between updates ## The "So What?" (Strategic Takeaway) {#so-what} Brewing Calculator is an established food & drink app that is completely free. It holds a 3.5/5 rating from 180 reviews. > **Bottom Line:** The app provides essential utility for homebrewers, but mathematical inaccuracies in gravity calculations undermine its reliability, so the PM must prioritize a logic audit to prevent power users from migrating to hardware-integrated competitors. **Best for:** Homebrewers and craft beer enthusiasts requiring precise measurements for recipe formulation and brew day management. ### PM Action Plan (Next Best Moves) - [ ] [INVEST] Audit and rebuild calculation logic because gravity and brix conversion errors are the #1 complaint theme → restore user trust and rating baseline. ### Feature Gaps vs Competitors - Hardware integration (available in Grainfather Community but absent here) ### Outlook: Mixed The homebrewing utility market is consolidating around tools that offer verified precision and hardware connectivity. Brewing Calculator remains exposed due to its unverified math engine, so the PM must pivot from maintenance to logic-verification to prevent churn to precision-focused rivals. - 🔴 Mathematical errors in gravity conversions lead to user frustration, which compounds the rating drag already visible on the Android platform. - 🟢 The ad-free, offline-first utility model retains a core user base that values simplicity over complex, hardware-integrated ecosystem features. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Overall Rating | 3.5/5 | | Total Reviews | 180 | | Sentiment | Mixed (55/100) | | Confidence | Medium | | Pricing Model | Free | | Platforms | iOS & Android | | Key Features | 3 analyzed | | Trend | Mixed | | Outlook | Mixed | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Brewing Calculator** (this app) | 3.5/5 | Mixed | Bartosz Lampart | | [Sourdough Feeding Calculator](https://marlvel.ai/apps/sourdough-feeding-calculator) | N/A/5 | N/A | NFP SOFTWARE | | [Pizza Pro - Dough Calculator](https://marlvel.ai/apps/pizza-pro-dough-calculator) | 5.0/5 | Mixed | Moritz Berger | | [Grainfather Community](https://marlvel.ai/apps/grainfather-community) | 4.0/5 | n/a | BSGi NZ Limited | | [PizzApp+](https://marlvel.ai/apps/pizzapp) | 4.5/5 | Mixed | NFP SOFTWARE | | [Pizza Dough Calculator](https://marlvel.ai/apps/pizza-dough-calculator) | N/A/5 | N/A | Zero Alpha | ## Company Profile - **Developer:** Bartosz Lampart ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/brewing-calculator/id6756520418?uo=4) - **Google Play:** [View on Google Play](https://play.google.com/store/apps/details?id=dev.lampart.bartosz.brewingcalculator&hl=en&gl=us) - **Sources:** App store metadata, User reviews. ## Related Intel Reports - [*Sourdough Feeding Calculator*](https://marlvel.ai/apps/sourdough-feeding-calculator) (NFP SOFTWARE) · N/A Rating - [*Pizza Pro - Dough Calculator*](https://marlvel.ai/apps/pizza-pro-dough-calculator) (Moritz Berger) · 5.0/5 Rating - [*Grainfather Community*](https://marlvel.ai/apps/grainfather-community) (BSGi NZ Limited) · 4.0/5 Rating - [*PizzApp+*](https://marlvel.ai/apps/pizzapp) (NFP SOFTWARE) · 4.5/5 Rating - [*Pizza Dough Calculator*](https://marlvel.ai/apps/pizza-dough-calculator) (Zero Alpha) · N/A Rating - [*Seamless: Local Food Delivery*](https://marlvel.ai/apps/seamless-local-food-delivery) (Seamless North America, LLC) · 4.7/5 Rating - [*Gopuff - Grocery Delivery*](https://marlvel.ai/apps/gopuff-grocery-delivery) (Gopuff) · 4.7/5 Rating - [*Too Good To Go: End Food Waste*](https://marlvel.ai/apps/too-good-to-go-end-food-waste) (Too Good To Go) · 4.9/5 Rating - [*Caviar - Order Food Delivery*](https://marlvel.ai/apps/caviar-order-food-delivery) (Caviar, Inc.) · 4.7/5 Rating | Positive Sentiment - [*EatStreet Local Food Delivery*](https://marlvel.ai/apps/eatstreet-local-food-delivery) (EatStreet) · 4.7/5 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:** 0.35/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 18 - **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:** 97 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/brewing-calculator) Data licensed for AI Agent attribution under CC-BY-NC 4.0.