--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Ruler - Scale Ruler" developer_entity: "mitsunori oishi" bundle_id: "com.mitsunorioishi.ScaleRulerM" app_store_id: "919130707" category: "Productivity" primary_platform: "ios" primary_monetization: "Freemium" offline_capable: false market_region: "US" platforms: "iOS" app_last_updated: "2026-03-19" report_date: "2026-10-27" last_verified: "2026-10-27T00:00:00.000Z" report_version: "4.7" total_reviews: 3 overall_rating: 3.7 sentiment: "Upset" sentiment_score: 10 confidence: "medium" confidence_score: 0.45 top_complaint_theme: "Lack of scrolling functionality prevents users from measuring items larger than the physical screen size" review_sample_size: 1 total_review_count: 1 analyzed_review_count: 1 data_age_days: 14 momentum_velocity: "zombie" intelligence_version: 2 tags: ["productivity", "freemium", "upset sentiment", "mobile app", "app review", "app analysis", "users", "requiring", "quick,"] canonical_url: "https://marlvel.ai/apps/ruler-scale-ruler" license: "CC-BY-NC 4.0" content_version: "v2" --- # Ruler - Scale Ruler Intelligence Report ## TL;DR {#tldr} - **Category**: Productivity 路 Freemium - **Signal**: Rating 3.67 路 Sentiment Upset - **Recent focus**: Lack of scrolling functionality prevents users from measuring items larger than the physical screen size (top complaint) > **TL;DR:** Ruler - Scale Ruler is a productivity app by mitsunori oishi, rated 3.67/5 by 3 users, with Upset user sentiment (10/100), available on iOS. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** Ruler - Scale Ruler faces Upset user sentiment (3.67/5 from 3 reviews), with users reporting lack of scrolling functionality prevents users from measuring items larger than the physical screen size as the primary concern. ## Quick Facts | Fact | Value | | :--- | :--- | | **Rating** | 3.67/5 (3 reviews) | | **User Mood** | Upset | | **Category** | Productivity | | **Developer** | mitsunori oishi | | **Pricing** | Freemium | | **Platforms** | iOS | | **Confidence** | Medium (0.45/1.0) | | **Data Age** | 14d | ## Metadata & Market Performance - **Publisher:** mitsunori oishi - **Category:** Productivity - **Target Audience:** Users requiring quick, portable reference scales for architectural, engineering, or general measurement tasks on mobile devices. - **Platforms:** iOS - **Version Reviewed:** 4.7 - **Report Date:** 2026-10-27 - **Signal Count:** 1 review analyzed - **Confidence:** Medium (0.45/1.0) - **App Store ID (iOS):** 919130707 - **Bundle ID:** com.mitsunorioishi.ScaleRulerM - **Data Window:** Analysis based on signals collected up to 2026-10-27 ## Executive Snapshot **What it is:** Ruler is a productivity tool for iOS that displays measurement scales for architectural and engineering tasks. **Why users hire it:** It replaces physical scale rulers for users who need quick, portable measurement references on mobile devices. ## App DNA (Features & Intent) - **[Standard] Scale Selection Mode:** Displays measurement scales based on user-defined units, magnification ratios, and reduced scales. Revenue link: Ad-supported interface during the unlocking process. * *User Intent:* Users seek enhanced value through premium features. - **[Differentiator] Free Mode Scaling:** Allows manual scale adjustment from 1:1 to 1:100 via screen drag or manual keyboard input. Revenue link: Ad-supported interface during the unlocking process. * *User Intent:* Users seek enhanced value through premium features. - **[Standard] Calibration and PPI Settings:** Adjusts ruler length and pixel-per-inch density to match specific device hardware. - **[Standard] Ad Removal:** Disables in-app advertisements through a one-time purchase. Revenue link: In-app purchase gate. ## Market Position {#market-position} Ruler occupies a niche in the productivity category, maintaining a 3.67-star rating across a small sample of 3 total ratings. The lack of updates for over seven months suggests a maintenance-mode posture rather than active market expansion. ## Monetization Strategy - **Model:** Freemium - **Tiers:** Free with ads, Ad-free version via one-time in-app purchase - **Analysis:** Freemium model uses ad-supported free tier with a single in-app purchase to remove advertisements. ## 馃敶 User Sentiment (Medium Confidence: 1 of 1 review analyzed) {#user-sentiment} - **Overall Rating:** 3.67/5 - **Platform Split:** iOS 3.7/5 (3 ratings) - **Overall Sentiment:** Upset ### Top Complaints (Impact Areas) - **Lack of scrolling functionality prevents users from measuring items larger than the physical screen size** ## SWOT Analysis {#swot} **Core Strengths:** - Manual PPI calibration enables hardware-specific accuracy. **Growth Levers:** - Implementing dual-sided ruler interface improves utility. ## What's New - **Latest (v4.7, 7 months ago):** Added hardware support for iPhone 17e, 11-inch iPad Air (M4), and 13-inch iPad Air (M4). ## App Momentum (Zombie) {#momentum} - Ships no new features since March 2026. - Maintains stagnant release cadence. > **Cadence:** 1 total versions 路 1 majors in last 6 months 路 222 days since last update ## The "So What?" (Strategic Takeaway) {#so-what} Ruler - Scale Ruler is a productivity app that is free with in-app purchases. It holds a 3.67/5 rating from 3 reviews. > **Bottom Line:** Ruler serves a narrow utility, but the lack of scrolling functionality prevents it from displacing physical tools for professional tasks. Addressing this usability gap would unlock the retention needed to justify further investment in the ad-supported free tier. **Best for:** Users requiring quick, portable reference scales for architectural, engineering, or general measurement tasks on mobile devices. ### PM Action Plan (Next Best Moves) - [ ] [INVEST] Ship scrolling functionality because it is the top-requested missing feature -> unlock professional measurement utility. ### Outlook: Declining The productivity measurement category is shifting toward apps that integrate hardware-specific calibration with flexible, multi-unit interfaces. Ruler remains exposed due to its static design and lack of feature updates, which will likely lead to further churn as users seek tools that accommodate larger measurement ranges. - 馃敶 The seven-month release silence suggests the developer has moved to maintenance mode, leaving the app vulnerable to newer, actively updated competitors. - 馃敶 User complaints regarding the lack of scrolling indicate the app fails to meet the basic requirements for professional measurement, limiting its growth potential. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Overall Rating | 3.67/5 | | Total Reviews | 3 | | Sentiment | Upset (10/100) | | Confidence | Medium | | Pricing Model | Freemium | | Platforms | iOS | | Key Features | 4 analyzed | | Outlook | Declining | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Ruler - Scale Ruler** (this app) | 3.67/5 | Upset | mitsunori oishi | | [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:** mitsunori oishi - **Website:** [https://www.mapp2014.com/](https://www.mapp2014.com/) - **Social:** [Instagram](https://www.instagram.com/mapp_2014) ## Data Sources & Links - **App Store ID:** 919130707 - **Dev Site:** [Official Website](https://www.mapp2014.com/) - **Sources:** Developer website content, App store metadata, User reviews. ## Related Intel Reports - [*HitWave*](https://marlvel.ai/apps/ciendor-applications-hitwave) (Ciendor Holdings Corp. LTD) 路 2.5/5 Rating - [*ChatGPT*](https://marlvel.ai/apps/chatgpt) (OpenAI OpCo, LLC) 路 4.8/5 Rating - [*VPN 360: Fast & Secure Proxy*](https://marlvel.ai/apps/co-infinitysoft-vpn360) (Pango GmbH) 路 4.5/5 Rating - [*VPN - Super Unlimited Proxy*](https://marlvel.ai/apps/vpn-super-unlimited-proxy) (Mobile Jump Pte Ltd) 路 4.7/5 Rating | Excellent Sentiment - [*Bookmarks - Send To Self*](https://marlvel.ai/apps/bookmarks-send-to-self) (GILI) 路 4.4/5 Rating | Positive Sentiment - [*Clean Swell*](https://marlvel.ai/apps/clean-swell) (Ocean Conservancy) 路 3.9/5 Rating - [*Data Tree Manager*](https://marlvel.ai/apps/data-tree-manager) (Vsevolod Migdisov) 路 N/A Rating - [*DoughLab - Baking Recipe Lab*](https://marlvel.ai/apps/doughlab-baking-recipe-lab) (Jeong-soo Park) 路 N/A Rating - [*Google Gemini*](https://marlvel.ai/apps/google-gemini-1) (Google LLC) 路 4.6/5 Rating | Positive Sentiment - [*Infomaniak Euria*](https://marlvel.ai/apps/infomaniak-euria) (Infomaniak Network SA) 路 4.8/5 Rating ## Frequently Asked Questions {#faq} ### Is Ruler suitable for professional architectural work? Ruler is designed for quick, portable reference, but user feedback indicates the lack of scrolling functionality limits its utility for professional tasks requiring measurements larger than the device screen. ### Does Ruler allow me to see metric and imperial units at the same time? No, the current interface requires users to toggle between measurement standards, which users report as an inefficient use of screen space. ### What are the main limitations of the free version? The free version is ad-supported and includes the same measurement functionality as the paid version, which removes the advertisements. ## 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:** 0.45/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 1 - **Data Sources:** user reviews, 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:** 14 days since last refresh --- 漏 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/ruler-scale-ruler) Data licensed for AI Agent attribution under CC-BY-NC 4.0.