--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Luminometer: Lux Light Meter" developer_entity: "27GROUP" bundle_id: "com.27group.lightmeter" app_store_id: "6446325225" category: "Utilities" primary_platform: "ios" primary_monetization: "Subscription" offline_capable: false market_region: "US" platforms: "iOS" app_last_updated: "2025-02-20" report_date: "2026-08-23" last_verified: "2026-08-23T00:00:00.000Z" report_version: "1.0.5" total_reviews: 16 overall_rating: 3.5 sentiment: "Frustrated" sentiment_score: 25 confidence: "low" confidence_score: 0.3 top_complaint_theme: "Users report that accurate measurements require a physical diffuser which the app fails to mention" review_sample_size: 1 total_review_count: 1 analyzed_review_count: 1 data_age_days: 4 momentum_velocity: "zombie" intelligence_version: 3 tags: ["utilities", "subscription", "frustrated sentiment", "mobile app", "app review", "app analysis", "homeowners,", "greenhouse", "hobbyists,"] canonical_url: "https://marlvel.ai/apps/luminometer-lux-light-meter" license: "CC-BY-NC 4.0" content_version: "v2" --- # Luminometer: Lux Light Meter Intelligence Report ## TL;DR {#tldr} - **Category**: Utilities · Subscription - **Signal**: Rating 3.5 · Sentiment Frustrated - **Recent focus**: Users report that accurate measurements require a physical diffuser which the app fails to mention (top complaint) > **TL;DR:** Luminometer: Lux Light Meter is a utilities app by 27GROUP, rated 3.5/5 by 16 users, with Frustrated user sentiment (25/100), available on iOS. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** Luminometer: Lux Light Meter faces Frustrated user sentiment (3.5/5 from 16 reviews), with users reporting users report that accurate measurements require a physical diffuser which the app fails to mention as the primary concern. ## Quick Facts | Fact | Value | | :--- | :--- | | **Rating** | 3.5/5 (16 reviews) | | **User Mood** | Frustrated | | **Category** | Utilities | | **Developer** | 27GROUP | | **Pricing** | Subscription | | **Platforms** | iOS | | **Confidence** | Low (0.3/1.0) | | **Data Age** | 4d | ## Metadata & Market Performance - **Publisher:** 27GROUP - **Category:** Utilities - **Target Audience:** Homeowners, greenhouse hobbyists, and professionals needing to measure light levels for plants, workstations, or interior lighting. - **Platforms:** iOS - **Version Reviewed:** 1.0.5 - **Report Date:** 2026-08-23 - **Signal Count:** 1 review analyzed - **Confidence:** Low (0.3/1.0) - **App Store ID (iOS):** 6446325225 - **Bundle ID:** com.27group.lightmeter - **Performance Trend:** Stable - **Data Window:** Analysis based on signals collected up to 2026-08-23 ## Executive Snapshot **What it is:** Luminometer is a light-metering utility for iOS that calculates lux and foot-candle intensity using internal camera exposure compensation. **Why users hire it:** The app removes the financial barrier to professional light-measurement hardware for hobbyists and interior designers. ## App DNA (Features & Intent) - **[Standard] Lux and Foot-candle Measurement:** Calculates light intensity using internal exposure compensation in both lx and foot-candle units. - **[Standard] Camera View Overlay:** Displays a live camera feed alongside real-time light intensity readings. - **[Basic] Premium Feature Access:** Unlocks advanced functionality via a weekly subscription model. * *User Intent:* Users seek enhanced value through premium features. ## Market Position {#market-position} Luminometer maintains a 3.5-star rating across 16 total ratings, indicating low user satisfaction. The lack of updates for over 18 months signals a maintenance-mode posture that risks losing ground to active competitors. ## Monetization Strategy - **Model:** Subscription - **Tiers:** Free tier with limited access, Premium tier at $3.99/week - **Analysis:** Subscription model anchored at $3.99/week, gating premium features behind an auto-renewing weekly payment. ## 🔴 User Sentiment (Low Confidence: 1 of 1 review analyzed) {#user-sentiment} - **Overall Rating:** 3.5/5 - **Platform Split:** iOS 3.5/5 (16 ratings) - **Overall Sentiment:** Frustrated ### Top Complaints (Impact Areas) - **Users report that accurate measurements require a physical diffuser which the app fails to mention** ## SWOT Analysis {#swot} **Core Strengths:** - Internal exposure compensation enables lux measurement without external hardware **Growth Levers:** - Publishing a DIY diffuser guide could resolve primary accuracy complaints ## What's New - **Latest (v1.0.5, 1 years ago):** Maintenance update addressing minor bugs and performance stability. ## App Momentum (Zombie) {#momentum} - No feature updates since early 2025. - Development velocity remains dormant. > **Cadence:** 1 total versions · 0 majors in last 6 months · 549 days since last update ## The "So What?" (Strategic Takeaway) {#so-what} Luminometer: Lux Light Meter is an utilities app. It holds a 3.5/5 rating from 16 reviews. > **Bottom Line:** Luminometer requires a shift toward basic utility functionality, specifically providing the necessary diffuser instructions to make the core measurement mechanism viable. Addressing these accuracy barriers is the only path to stabilizing the user base before the long development gap leads to total churn. **Best for:** Homeowners, greenhouse hobbyists, and professionals needing to measure light levels for plants, workstations, or interior lighting. ### PM Action Plan (Next Best Moves) - [ ] [INVEST] Ship a DIY diffuser guide because users report accurate readings are impossible without one -> improve rating baseline ### Outlook: Declining Luminometer is in a state of stagnation, with no meaningful updates to address core usability issues for over a year. The lack of investment in basic user guidance and interface hygiene leaves the app highly vulnerable to any active competitor in the light-metering utility space. - 🔴 The 18-month development gap indicates a lack of active investment, which erodes user trust and prevents the app from addressing critical accuracy complaints. - 🔴 Intrusive ad placement obscures the core measurement interface, directly causing the negative sentiment observed in recent feedback. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Overall Rating | 3.5/5 | | Total Reviews | 16 | | Sentiment | Frustrated (25/100) | | Confidence | Low | | Pricing Model | Subscription | | Platforms | iOS | | Key Features | 3 analyzed | | Trend | Stable | | Outlook | Declining | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Luminometer: Lux Light Meter** (this app) | 3.5/5 | Frustrated | 27GROUP | | [Sota Connect: Secure Network](https://marlvel.ai/apps/fi-catconnect-sota) | 4.9/5 | N/A | Cat Connect | | [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) | 4.5/5 | Mixed | Fuxin Technology | | [Potatso](https://marlvel.ai/apps/potatso) | 4.4/5 | n/a | Potatso Lab LTD | ## Company Profile - **Developer:** 27GROUP ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/luminometer-lux-light-meter/id6446325225?uo=4) - **Sources:** App store metadata, User reviews. ## Related Intel Reports - [*Sota Connect: Secure Network*](https://marlvel.ai/apps/fi-catconnect-sota) (Cat Connect) · 4.9/5 Rating - [*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) · 4.5/5 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 ## Frequently Asked Questions {#faq} ### Is Luminometer accurate for professional lighting work? Users report that accurate readings require a physical diffuser, which the app does not provide or explain how to create, limiting its professional utility. ### Does Luminometer have intrusive ads? Yes, reviewers report that ads frequently cover the measurement interface, disrupting the user experience. ### Is there a free version of Luminometer? Luminometer offers a free tier, but it is limited and heavily supported by ads that may interfere with the app's primary measurement functions. ## 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:** 0.3/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 1 - **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:** 4 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/luminometer-lux-light-meter) Data licensed for AI Agent attribution under CC-BY-NC 4.0.