--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Simple ratio calculator" developer_entity: "Ryoma Toda" bundle_id: "com.johnT.SimpleRatioCalculator" app_store_id: "6738031350" category: "Productivity" primary_platform: "ios" primary_monetization: "Free" offline_capable: false market_region: "US" platforms: "iOS" app_last_updated: "2025-05-27" report_date: "2026-10-21" last_verified: "2026-10-21T00:00:00.000Z" report_version: "v1.2.0" total_reviews: 0 confidence: "low" confidence_score: 0.05 data_age_days: 25 momentum_velocity: "zombie" intelligence_version: 2 tags: ["productivity", "free", "mobile app", "app review", "app analysis", "users", "requiring", "quick,"] canonical_url: "https://marlvel.ai/apps/simple-ratio-calculator" license: "CC-BY-NC 4.0" content_version: "v2" --- # Simple ratio calculator Intelligence Report ## TL;DR {#tldr} - **Category**: Productivity · Free > **TL;DR:** Simple ratio calculator is a productivity app by Ryoma Toda, available on iOS. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** Simple ratio calculator is a productivity app by Ryoma Toda. ## Quick Facts | Fact | Value | | :--- | :--- | | **Category** | Productivity | | **Developer** | Ryoma Toda | | **Pricing** | Free | | **Platforms** | iOS | | **Confidence** | Low (0.05/1.0) | | **Data Age** | 25d | ## Metadata & Market Performance - **Publisher:** Ryoma Toda - **Category:** Productivity - **Target Audience:** Users requiring quick, repeatable ratio calculations for cooking, scientific experiments, or design projects. - **Platforms:** iOS - **Version Reviewed:** v1.2.0 - **Report Date:** 2026-10-21 - **Signal Count:** 0 reviews analyzed - **Confidence:** Low (0.05/1.0) - **App Store ID (iOS):** 6738031350 - **Bundle ID:** com.johnT.SimpleRatioCalculator - **Data Window:** Analysis based on signals collected up to 2026-10-21 ## Executive Snapshot **What it is:** Simple ratio calculator is a minimalist utility for calculating and saving component proportions on iOS. **Why users hire it:** It removes the cognitive friction of manual recalculation for users performing repeat tasks in cooking, design, and scientific experiments. ## App DNA (Features & Intent) - **[Basic] Ratio Calculation:** Calculates component ratios for mixtures, recipes, and design proportions. * *User Intent:* Users seek enhanced value through premium features. - **[Standard] Formula Saving:** Stores frequently used formulas for repeated access, reducing friction for repeat tasks. - **[Standard] Minimalist UI:** Removes interface clutter to focus on calculation inputs. ## Market Position {#market-position} Simple ratio calculator operates as a basic utility in the Productivity category. The lack of updates for over 500 days suggests a maintenance-mode posture that limits its competitive standing against active, frequently updated rivals. ## Monetization Strategy - **Model:** Free - **Tiers:** Free - **Analysis:** The app is distributed as a free utility with no visible monetization or in-app purchase gates. ## SWOT Analysis {#swot} **Core Strengths:** - Minimalist UI design focuses user attention on calculation inputs. **Growth Levers:** - Adding batch-scaling presets would address common user needs in cooking and design. ## What's New - **Latest (vv1.2.0, 1 years ago):** Addressed reported issues and improved general usability. ## App Momentum (Zombie) {#momentum} - No feature updates in 17 months. - Maintenance-only cadence since May 2025. > **Cadence:** 1 total versions · 0 majors in last 6 months · 511 days since last update ## The "So What?" (Strategic Takeaway) {#so-what} Simple ratio calculator is a productivity app that is completely free. > **Bottom Line:** Simple ratio calculator serves a niche need for simple proportion math, but the 17-month development silence suggests a maintenance-only posture. A stability audit would confirm if the app remains viable for users on current operating systems. **Best for:** Users requiring quick, repeatable ratio calculations for cooking, scientific experiments, or design projects. ### PM Action Plan (Next Best Moves) - [ ] [MAINTAIN] Audit OS compatibility because the app has not been updated in 17 months → ensure baseline functionality ### Outlook: Declining The productivity utility market is consolidating around apps with frequent update cadences that ensure long-term OS compatibility. Simple ratio calculator remains exposed due to its 17-month silence, which signals to users that the tool may no longer be supported. - 🔴 The 17-month development gap suggests the app is in maintenance mode, which reduces its ability to adapt to new OS requirements. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Total Reviews | 0 | | Confidence | Low | | Pricing Model | Free | | Platforms | iOS | | Key Features | 3 analyzed | | Outlook | Declining | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Simple ratio calculator** (this app) | N/A/5 | N/A | Ryoma Toda | | [HitWave](https://marlvel.ai/apps/ciendor-applications-hitwave) | 2.5/5 | Mixed | Ciendor Holdings Corp. LTD | | [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 | | [ChatGPT](https://marlvel.ai/apps/chatgpt) | 4.8/5 | n/a | OpenAI OpCo, LLC | ## Company Profile - **Developer:** Ryoma Toda ## Data Sources & Links - **App Store ID:** 6738031350 - **Sources:** App store metadata. ## Related Intel Reports - [*HitWave*](https://marlvel.ai/apps/ciendor-applications-hitwave) (Ciendor Holdings Corp. 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Yes, Simple ratio calculator is currently distributed as a free utility with no visible monetization or in-app purchase gates. ### Does Simple ratio calculator save my formulas? Yes, the app includes a formula saving function that allows users to store frequently used ratios for repeated access. ### What is the main difference between this and a standard calculator? Simple ratio calculator is designed specifically for proportion and mixture calculations, whereas standard calculators require manual input for every step of a ratio equation. ### Is Simple ratio calculator still being updated? The app has not received a major update in over 17 months, suggesting it is currently in a maintenance-only state. ## 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:** 0.05/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 0 - **Data Sources:** 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:** 25 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/simple-ratio-calculator) Data licensed for AI Agent attribution under CC-BY-NC 4.0.