--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "PPI Calc - PPI Calculator" developer_entity: "Fausto Ristagno" bundle_id: "net.doublerew.PPICalc" app_store_id: "898198587" category: "Utilities" primary_platform: "ios" primary_monetization: "Free" offline_capable: false market_region: "US" platforms: "iOS" app_last_updated: "2014-07-20" report_date: "2026-08-05" last_verified: "2026-08-05T00:00:00.000Z" report_version: "1.0" total_reviews: 13 overall_rating: 4.4 sentiment: "Mixed" sentiment_score: 60 confidence: "medium" confidence_score: 0.5 top_praise_theme: "The free cost structure makes this tool accessible for digital artists needing pixel density calculations" top_complaint_theme: "The app fails to launch on current operating systems, triggering compatibility warnings that force deletion" review_sample_size: 5 total_review_count: 5 analyzed_review_count: 5 data_age_days: 9 momentum_velocity: "zombie" intelligence_version: 3 tags: ["utilities", "free", "mixed sentiment", "mobile app", "app review", "app analysis", "developers,", "designers,", "hardware"] canonical_url: "https://marlvel.ai/apps/ppi-calc-ppi-calculator" license: "CC-BY-NC 4.0" content_version: "v2" --- # PPI Calc - PPI Calculator Intelligence Report ## TL;DR {#tldr} - **Category**: Utilities · Free - **Signal**: Rating 4.38 · Sentiment Mixed - **Recent focus**: The app fails to launch on current operating systems, triggering compatibility warnings that force deletion (top complaint) · The free cost structure makes this tool accessible for digital artists needing pixel density calculations (top praise) > **TL;DR:** PPI Calc - PPI Calculator is a utilities app by Fausto Ristagno, rated 4.38/5 by 13 users, with Mixed user sentiment (60/100), available on iOS. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** PPI Calc - PPI Calculator shows Mixed sentiment (4.38/5 from 13 reviews) - users praise the free cost structure makes this tool accessible for digital artists needing pixel density calculations but report issues with the app fails to launch on current operating systems, triggering compatibility warnings that force deletion. ## Quick Facts | Fact | Value | | :--- | :--- | | **Rating** | 4.38/5 (13 reviews) | | **User Mood** | Mixed | | **Category** | Utilities | | **Developer** | Fausto Ristagno | | **Pricing** | Free | | **Platforms** | iOS | | **Confidence** | Medium (0.5/1.0) | | **Data Age** | 9d | ## Metadata & Market Performance - **Publisher:** Fausto Ristagno - **Category:** Utilities - **Target Audience:** Developers, designers, and hardware enthusiasts requiring quick screen specification lookups. - **Platforms:** iOS - **Version Reviewed:** 1.0 - **Report Date:** 2026-08-05 - **Signal Count:** 5 reviews analyzed - **Confidence:** Medium (0.5/1.0) - **App Store ID (iOS):** 898198587 - **Bundle ID:** net.doublerew.PPICalc - **Performance Trend:** Stable - **Data Window:** Analysis based on signals collected up to 2026-08-05 ## Executive Snapshot **What it is:** PPI Calc - PPI Calculator is a free utility for iOS that calculates pixel density and screen dimensions for designers and hardware enthusiasts. **Why users hire it:** The tool removes the cognitive friction of manual screen math by providing a preset library of standard resolutions and device specifications. ## App DNA (Features & Intent) - **[Basic] PPI Calculation:** Calculates pixels per inch based on screen resolution and physical dimensions. - **[Standard] Screen Measurement Tools:** Calculates height, width, and area in inches or centimeters. - **[Differentiator] Preset Resolution Library:** Provides a list of standard resolutions and common device specifications to auto-fill input fields. * *User Intent:* Users seek enhanced value through premium features. ## Market Position {#market-position} PPI Calc - PPI Calculator occupies a legacy utility niche, holding a 4.38-star rating across 13 total ratings. The lack of updates for over 4,300 days confirms its status as a non-maintained asset. ## Monetization Strategy - **Model:** Free - **Tiers:** Free - **Analysis:** The app is distributed as a free utility with no visible monetization or in-app purchase gates. ## 🟡 User Sentiment (Medium Confidence: 5 of 5 reviews analyzed) {#user-sentiment} - **Overall Rating:** 4.38/5 - **Platform Split:** iOS 4.4/5 (13 ratings) - **Overall Sentiment:** Mixed ### Top Praises - **The free cost structure makes this tool accessible for digital artists needing pixel density calculations** - **Determining pixel density helps consumers make informed decisions when purchasing new television or monitor hardware** ### Top Complaints (Impact Areas) - **The app fails to launch on current operating systems, triggering compatibility warnings that force deletion** ## SWOT Analysis {#swot} **Core Strengths:** - Preset resolution library provides a time-saving reference for hardware planning **Growth Levers:** - Modernizing the codebase could recapture the design-utility segment ## App Momentum (Zombie) {#momentum} - Dormant since July 2014. - No updates in 4,399 days. > **Cadence:** 1 total versions · 1 majors in last 6 months · 4398 days since last update ## The "So What?" (Strategic Takeaway) {#so-what} PPI Calc - PPI Calculator is an utilities app that is completely free. It holds a 4.38/5 rating from 13 reviews. > **Bottom Line:** PPI Calc - PPI Calculator is a non-functional legacy asset that currently damages the developer's reputation through persistent launch failures. Sunsetting the app would prevent further negative sentiment from users encountering broken software. **Best for:** Developers, designers, and hardware enthusiasts requiring quick screen specification lookups. ### PM Action Plan (Next Best Moves) - [ ] [SUNSET] Sunset the app because it has been non-functional for over a decade → stop brand erosion. ### Outlook: Declining The utility market for screen specification lookups has shifted toward web-based tools that update instantly with new hardware releases. PPI Calc - PPI Calculator remains stuck in 2014, meaning it is effectively a dead product that provides no value to current users. - 🔴 The 12-year update gap results in total incompatibility with modern operating systems, leading to active user frustration and deletion. - 🔴 The lack of maintenance prevents the inclusion of modern screen resolutions, making the tool obsolete for current hardware planning. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Overall Rating | 4.38/5 | | Total Reviews | 13 | | Sentiment | Mixed (60/100) | | Confidence | Medium | | Pricing Model | Free | | Platforms | iOS | | Key Features | 3 analyzed | | Trend | Stable | | Outlook | Declining | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **PPI Calc - PPI Calculator** (this app) | 4.38/5 | Mixed | Fausto Ristagno | | [avoVPN Desktop](https://marlvel.ai/apps/avovpn-desktop) | N/A/5 | N/A | Avocado VPN Technologies | | [Free VPN by Free VPN .org™](https://marlvel.ai/apps/free-vpn-by-free-vpn-org) | 4.5/5 | Mixed | Free VPN LLC | | [Fusvob VPN : Super VPN 2026](https://marlvel.ai/apps/com-toplinkc-foxexcellent) | 4.4/5 | Mixed | Fuxin Technology | | [Potatso](https://marlvel.ai/apps/potatso) | 4.4/5 | n/a | Potatso Lab LTD | | [Quantumult X](https://marlvel.ai/apps/quantumult-x) | 3.8/5 | N/A | Cross Utility Ltd | ## Company Profile - **Developer:** Fausto Ristagno - **Website:** [https://doublerew.net/en/app/ios/ppi-calc/](https://doublerew.net/en/app/ios/ppi-calc/) ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/ppi-calc-ppi-calculator/id898198587?uo=4) - **Dev Site:** [Official Website](https://doublerew.net/en/app/ios/ppi-calc/) - **Sources:** Developer website content, App store metadata, User reviews. ## Related Intel Reports - [*avoVPN Desktop*](https://marlvel.ai/apps/avovpn-desktop) (Avocado VPN Technologies) · N/A Rating - [*Free VPN by Free VPN .org™*](https://marlvel.ai/apps/free-vpn-by-free-vpn-org) (Free VPN LLC) · 4.5/5 Rating - [*Fusvob VPN : Super VPN 2026*](https://marlvel.ai/apps/com-toplinkc-foxexcellent) (Fuxin Technology) · 4.4/5 Rating - [*Potatso*](https://marlvel.ai/apps/potatso) (Potatso Lab LTD) · 4.4/5 Rating - [*Quantumult X*](https://marlvel.ai/apps/quantumult-x) (Cross Utility Ltd) · 3.8/5 Rating - [*V2Box - V2ray Client*](https://marlvel.ai/apps/v2box-v2ray-client) (techlaim) · 4.6/5 Rating - [*카톡 분석 - 오픈채팅, 카톡 채팅 분석, 통계, 검색*](https://marlvel.ai/apps/com-liger-katalkanalysispaid) (Park Sung Cheol) · N/A Rating - [*로또 황금번호 생성기*](https://marlvel.ai/apps/lotto-lottogold) (jaehwan lee) · N/A Rating - [*도사폰 (만세력 역학도구)*](https://marlvel.ai/apps/app--656) (Softchaser Company Limited) · 5.0/5 Rating - [*근로자 공수달력*](https://marlvel.ai/apps/jaehwan-worktracer) (jaehwan lee) · N/A Rating ## Frequently Asked Questions {#faq} ### Is PPI Calc - PPI Calculator still supported? No, the app has not received an update since July 2014 and is currently non-functional on modern mobile operating systems. ### What can I use instead of PPI Calc? Users should consider modern web-based screen resolution calculators, which are updated regularly to include the latest device specifications. ### Does PPI Calc work on the latest iOS versions? No, users report that the app fails to launch on newer operating systems and displays compatibility warnings. ## 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:** 0.5/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 5 - **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:** 9 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/ppi-calc-ppi-calculator) Data licensed for AI Agent attribution under CC-BY-NC 4.0.