--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Protractor+" developer_entity: "Tue Nguyen Minh" bundle_id: "com.phoenixsolutions.protractor" app_store_id: "631311541" google_play_id: "com.exatools.protractor" category: "Utilities" primary_platform: "ios" primary_monetization: "Freemium" offline_capable: false market_region: "US" platforms: "iOS & Android" app_last_updated: "2026-01-14" report_date: "2026-06-23" last_verified: "2026-06-23T00:00:00.000Z" report_version: "2.4.4" total_reviews: 16144 overall_rating: 4.2 sentiment: "Frustrated" sentiment_score: 25 confidence: "low" confidence_score: 0.8 top_praise_theme: "Visual camera overlay tools provide accurate measurements for quick home improvement tasks" top_complaint_theme: "Aggressive monetization tactics restrict core functionality behind paywalls immediately after installation" review_sample_size: 99 total_review_count: 99 analyzed_review_count: 69 data_age_days: 55 momentum_velocity: "maintenance" intelligence_version: 5 competitor_count: 6 tags: ["utilities", "freemium", "frustrated sentiment", "mobile app", "app review", "app analysis", "enthusiasts,", "students,", "construction"] canonical_url: "https://marlvel.ai/apps/protractor-1" license: "CC-BY-NC 4.0" content_version: "v2" --- # Protractor+ Intelligence Report ## TL;DR {#tldr} - **Category**: Utilities · Freemium - **Signal**: Rating 4.16 · Sentiment Frustrated - **Recent focus**: Aggressive monetization tactics restrict core functionality behind paywalls immediately after installation (top complaint) · Visual camera overlay tools provide accurate measurements for quick home improvement tasks (top praise) > **TL;DR:** Protractor+ is a utilities app by Tue Nguyen Minh, rated 4.16/5 by 16.1K users, with Frustrated user sentiment (25/100), available on iOS & Android. > > **Marlvel.ai App Intelligence** — Independent analysis. US Market. No publisher influence. > **Key Insight:** Protractor+ faces Frustrated user sentiment (4.16/5 from 16.1K reviews), with aggressive monetization tactics restrict core functionality behind paywalls immediately after installation as the primary user concern. ## Quick Facts | Fact | Value | | :--- | :--- | | **Rating** | 4.16/5 (16.1K reviews) | | **User Mood** | Frustrated | | **Category** | Utilities | | **Developer** | Tue Nguyen Minh | | **Pricing** | Freemium | | **Platforms** | iOS & Android | | **Confidence** | Low (0.8/1.0) | | **Data Age** | 55d | ## Metadata & Market Performance - **Publisher:** Tue Nguyen Minh - **Category:** Utilities - **Target Audience:** DIY enthusiasts, students, and construction professionals requiring portable, camera-integrated angle measurement tools. - **Platforms:** iOS & Android - **Version Reviewed:** 2.4.4 - **Report Date:** 2026-06-23 - **Signal Count:** 99 reviews analyzed - **Confidence:** Low (0.8/1.0) - **App Store ID (iOS):** 631311541 - **Bundle ID:** com.phoenixsolutions.protractor - **Google Play ID:** com.exatools.protractor - **Performance Trend:** Declining - **Data Window:** Analysis based on signals collected up to 2026-06-23 ## Executive Snapshot **What it is:** Protractor+ is a utility app for iOS and Android that turns the camera into an angle measurement tool for DIY and construction tasks. **Why users hire it:** Users hire this app for quick, portable geometry checks on physical objects, but the current monetization design forces a trade-off between utility and ad-interruption that drives users to seek alternatives. ## App DNA (Features & Intent) - **[Differentiator] Polygon Measurement:** Draw custom shapes on screen or camera preview to calculate internal angles * *User Intent:* Users value self-expression and personalized experiences. - **[Differentiator] Camera-based Measurement:** Overlay angle measurement tools onto real-time camera feed for physical object analysis - **[Standard] Plumb Bob Mode:** Pendulum-based tool to determine surface slope and vertical alignment ## Market Position {#market-position} Protractor+ maintains a 4.11 rating across 16,144 total ratings, but the low 99-review sample size suggests limited active engagement compared to specialized competitors. The monetization friction relative to the simple utility of the app creates a ceiling for growth. ## Monetization Strategy - **Model:** Freemium - **Tiers:** Free tier with ad support, Premium tier via IAP for ad removal and advanced measurement tools - **Analysis:** Monetization relies on an ad-supported free tier with a feature-gated premium upgrade for professional measurement modes. ## 🔴 User Sentiment (Low Confidence: 69 of 99 reviews analyzed) {#user-sentiment} - **Overall Rating:** 4.16/5 - **Platform Split:** iOS 4.1/5 (10.4K ratings) | Android 4.2/5 (5.8K ratings) - **Overall Sentiment:** Frustrated - **Note:** The 4.16/5 store rating reflects cumulative history, while the Frustrated sentiment reflects recent user reviews analyzed by our AI pipeline. ### Top Praises - **Visual camera overlay tools provide accurate measurements for quick home improvement tasks** ### Top Complaints (Impact Areas) - **Aggressive monetization tactics restrict core functionality behind paywalls immediately after installation** ## SWOT Analysis {#swot} **Core Strengths:** - Camera-based measurement mechanism enables immediate real-world utility - Plumb Bob mode provides specialized retention for construction tasks **Growth Levers:** - Import-from-photo functionality for free users - B2B partnerships with hardware retailers for tool distribution ## Recent Changes (v4 → v5) {#recent-changes} The app's competitive outlook remains negative as the PM pivots from feature development to urgent monetization and performance fixes to address high churn. **Overall trend**: Declining **Compared at**: 2026-06-23 ### High-impact changes - **[Shifted] Monetization Strategy Pivot** (pricing) - **[Declined] Intensified Monetization Complaints** (sentiment) ### Medium-impact changes - **[Added] Platform-Specific Performance Gap** (swot) - **[Shifted] Audience Expansion** (audience) ## What's New - **Latest (v1.7.00, 4 months ago):** Introduced Premium features including polygon and angle measurements, color customization, additional units, and enhanced camera tools like laser lines and custom plumb bobs. ## App Momentum (Maintenance) {#momentum} - Shipped polygon measurement tool - Introduced laser and auxiliary line overlays - Expanded angle unit support > **Cadence:** 2 total versions · 1 majors in last 6 months · 121 days since last update · 61 days avg between updates ## The "So What?" (Strategic Takeaway) {#so-what} Protractor+ is a utilities app that is free with in-app purchases. With a 4.16/5 rating from 16.1K reviews, it faces significant user friction. > **Bottom Line:** Protractor+ delivers high-utility camera measurement, but aggressive monetization kills the user experience, so the PM must pivot to a trial-based model to stop the churn and stabilize the rating. **Best for:** DIY enthusiasts, students, and construction professionals requiring portable, camera-integrated angle measurement tools. ### PM Action Plan (Next Best Moves) - [ ] [PIVOT] Pivot monetization to a 3-day trial because paywall gating triggers high-churn sentiment → increase long-term retention ### Feature Gaps vs Competitors - Data documentation and export (available in Angle Meter PRO but absent here) ### Outlook: Declining The utility market is consolidating around apps that provide frictionless access to core tools, leaving Protractor+ exposed due to its aggressive monetization. Unless the team shifts to a trial-based model and resolves performance regressions, the app will continue to lose ground to competitors with higher release cadences. - 🔴 Aggressive paywall gating immediately after installation drives high churn, which compounds the negative sentiment visible in recent user reviews. - 🔴 Performance regressions in the latest update (lag and orientation issues) erode the core camera-measurement utility, further depressing the Android rating. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Overall Rating | 4.16/5 | | Total Reviews | 16.1K | | Sentiment | Frustrated (25/100) | | Confidence | Low | | Pricing Model | Freemium | | Platforms | iOS & Android | | Key Features | 3 analyzed | | Trend | Declining | | Outlook | Declining | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Protractor+** (this app) | 4.16/5 | Frustrated | Tue Nguyen Minh | | [pCAM Pro - Camera Tools](https://marlvel.ai/apps/com-eubank-pcam-pro) | 4.9/5 | Thrilled | David Eubank | | [MKS Beton](https://marlvel.ai/apps/com-mksbetongroup-mymksbeton) | N/A/5 | N/A | MKS BETON LLC | | [Angle Meter](https://marlvel.ai/apps/angle-meter) | 2.3/5 | N/A | nakhon phagdeechat | | [Angle Meter PRO](https://marlvel.ai/apps/angle-meter-pro) | 4.2/5 | N/A | nakhon phagdeechat | | [Moro AgriExpert Farm Calc](https://marlvel.ai/apps/moro-agriexpert-farm-calc) | N/A/5 | N/A | BMAC INFOTECH | ## Company Profile - **Developer:** Tue Nguyen Minh - **Website:** [https://www.phoenixmobileonline.com](https://www.phoenixmobileonline.com) ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/protractor/id631311541?uo=4) - **Google Play:** [View on Google Play](https://play.google.com/store/apps/details?id=com.exatools.protractor&hl=en&gl=us) - **Dev Site:** [Official Website](https://www.phoenixmobileonline.com) - **Sources:** Developer website content, About us / company information, App store metadata, User reviews. ## Related Intel Reports - [*pCAM Pro - Camera Tools*](https://marlvel.ai/apps/com-eubank-pcam-pro) (David Eubank) · 4.9/5 Rating | Excellent Sentiment - [*MKS Beton*](https://marlvel.ai/apps/com-mksbetongroup-mymksbeton) (MKS BETON LLC) · N/A Rating - [*Angle Meter*](https://marlvel.ai/apps/angle-meter) (nakhon phagdeechat) · 2.3/5 Rating - [*Angle Meter PRO*](https://marlvel.ai/apps/angle-meter-pro) (nakhon phagdeechat) · 4.2/5 Rating - [*Moro AgriExpert Farm Calc*](https://marlvel.ai/apps/moro-agriexpert-farm-calc) (BMAC INFOTECH) · N/A Rating - [*Orenda*](https://marlvel.ai/apps/orenda) (Hasa Inc.) · 4.7/5 Rating | Positive Sentiment - [*V2Box - V2ray Client*](https://marlvel.ai/apps/v2box-v2ray-client) (techlaim) · 4.6/5 Rating | Positive Sentiment - [*Free VPN by Free VPN .org™*](https://marlvel.ai/apps/free-vpn-by-free-vpn-org) (Free VPN LLC) · 4.4/5 Rating - [*Potatso*](https://marlvel.ai/apps/potatso) (Potatso Lab LTD) · 4.4/5 Rating | Positive Sentiment - [*Quantumult X*](https://marlvel.ai/apps/quantumult-x) (Cross Utility Ltd) · 3.8/5 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:** 0.8/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 99 - **Data Sources:** user reviews, developer website, company about page, 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:** 55 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/protractor-1) Data licensed for AI Agent attribution under CC-BY-NC 4.0.