--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "EV13 - Light meter app" developer_entity: "Minsang choi" bundle_id: "minsang.GlassLightMeter" app_store_id: "6749815010" category: "Photo & Video" primary_platform: "ios" primary_monetization: "Free" offline_capable: false market_region: "US" platforms: "iOS" app_last_updated: "2025-09-16" report_date: "2026-08-23" last_verified: "2026-08-23T00:00:00.000Z" report_version: "1.2.1" total_reviews: 15 overall_rating: 4.7 sentiment: "Thrilled" sentiment_score: 85 confidence: "low" confidence_score: 0.3 top_praise_theme: "Tactile design elements like haptics and micro animations create a premium, immersive experience for photography enthusiasts" top_complaint_theme: "Technical confusion regarding exposure value terminology creates frustration for users with a background in photometry" review_sample_size: 9 total_review_count: 9 analyzed_review_count: 9 data_age_days: 38 momentum_velocity: "zombie" intelligence_version: 3 tags: ["photo & video", "free", "thrilled sentiment", "mobile app", "app review", "app analysis", "photography", "enthusiasts", "analog"] canonical_url: "https://marlvel.ai/apps/ev13-light-meter-app" license: "CC-BY-NC 4.0" content_version: "v2" --- # EV13 - Light meter app Intelligence Report ## TL;DR {#tldr} - **Category**: Photo & Video · Free - **Signal**: Rating 4.67 · Sentiment Thrilled - **Recent focus**: Technical confusion regarding exposure value terminology creates frustration for users with a background in photometry (top complaint) · Tactile design elements like haptics and micro animations create a premium, immersive experience for photography enthusiasts (top praise) > **TL;DR:** EV13 - Light meter app is a photo & video app by Minsang choi, rated 4.67/5 by 15 users, with Thrilled user sentiment (85/100), available on iOS. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** EV13 - Light meter app maintains Thrilled user sentiment (4.67/5 from 15 reviews), with users consistently praising tactile design elements like haptics and micro animations create a premium, immersive experience for photography enthusiasts. ## Quick Facts | Fact | Value | | :--- | :--- | | **Rating** | 4.67/5 (15 reviews) | | **User Mood** | Thrilled | | **Category** | Photo & Video | | **Developer** | Minsang choi | | **Pricing** | Free | | **Platforms** | iOS | | **Confidence** | Low (0.3/1.0) | | **Data Age** | 38d | ## Metadata & Market Performance - **Publisher:** Minsang choi - **Category:** Photo & Video - **Target Audience:** Film photography enthusiasts and analog camera users seeking a digital companion for exposure calculation. - **Platforms:** iOS - **Version Reviewed:** 1.2.1 - **Report Date:** 2026-08-23 - **Signal Count:** 9 reviews analyzed - **Confidence:** Low (0.3/1.0) - **App Store ID (iOS):** 6749815010 - **Bundle ID:** minsang.GlassLightMeter - **Performance Trend:** Declining - **Data Window:** Analysis based on signals collected up to 2026-08-23 ## Executive Snapshot **What it is:** EV13 is a light meter utility for film photography enthusiasts that provides manual exposure calculations via a tactile analog interface on iOS. **Why users hire it:** The app removes the cognitive friction of digital menus, allowing users to maintain the manual workflow of vintage film cameras. ## App DNA (Features & Intent) - **[Differentiator] Tactile Analog Control:** Manual adjustment interface for aperture, shutter speed, and ISO settings, building category authority through physical camera mimicry. - **[Differentiator] Engraved Metadata Capture:** Embeds light meter information directly onto captured photos, creating a unique artifact that encourages repeat usage. ## Market Position {#market-position} EV13 maintains a 4.67 rating across 15 reviews, positioning itself as a niche utility for analog photographers. The lack of monetization and updates suggests a hobbyist-led project rather than a commercial competitor. ## Monetization Strategy - **Model:** Free - **Tiers:** Free - **Analysis:** The app is currently offered for free with no visible subscription or IAP gates. ## 🟢 User Sentiment (Low Confidence: 9 of 9 reviews analyzed) {#user-sentiment} - **Overall Rating:** 4.67/5 - **Platform Split:** iOS 4.7/5 (15 ratings) - **Overall Sentiment:** Thrilled ### Top Praises - **Tactile design elements like haptics and micro animations create a premium, immersive experience for photography enthusiasts** - **Minimalist interface design helps users focus on the manual process of operating a camera without unnecessary digital clutter** - **Accurate light metering suggestions provide functional value for users experimenting with vintage manual lenses** ### Top Complaints (Impact Areas) - **Technical confusion regarding exposure value terminology creates frustration for users with a background in photometry** ## SWOT Analysis {#swot} **Core Strengths:** - Tactile analog control interface mimics physical camera operation - Engraved metadata capture creates a unique artifact **Growth Levers:** - Shutter priority mode would address frequent user requests - Aspect ratio framing tools would expand utility ## Recent Changes (v2 → v3) {#recent-changes} The analytical outlook for EV13 shifted from mixed to declining, as the prolonged 340-day development silence is now framed as a critical risk to the app's long-term viability rather than a neutral maintenance state. **Overall trend**: Declining **Compared at**: 2026-08-23 ### High-impact changes - **[Shifted] Monetization Strategy Reassessment** (positioning) ### Medium-impact changes - **[Added] Development Stagnation as Threat** (swot) - **[Declined] Outlook Trend Downgrade** (positioning) ## What's New - **Latest (v1.2.1, 11 months ago):** Introduced Liquid Glass HUD, BW/Color toggles, aspect ratio controls, and a film strip output style. ## App Momentum (Zombie) {#momentum} - Last major release September 2025. - Dormant development for 340 days. > **Cadence:** 1 total versions · 1 majors in last 6 months · 340 days since last update ## The "So What?" (Strategic Takeaway) {#so-what} EV13 - Light meter app is a market-leading photo & video app that is completely free. With a 4.67/5 rating from 15 reviews, it delivers strong user satisfaction. > **Bottom Line:** EV13 retains a loyal base through its considered tactile design, but the lack of updates since September 2025 signals a maintenance-mode posture that risks losing users to more active alternatives. **Best for:** Film photography enthusiasts and analog camera users seeking a digital companion for exposure calculation. ### PM Action Plan (Next Best Moves) - [ ] [MAINTAIN] Audit exposure terminology because users report confusion with absolute luminance definitions -> improve professional credibility ### Outlook: Declining The light meter category is consolidating around apps that offer frequent feature updates and precise manual controls. EV13's stalled development cycle leaves it exposed, as the lack of new features will likely drive power users toward more active competitors. - 🔴 The 340-day update gap signals a maintenance-only posture, which erodes user trust in the app's long-term compatibility with future iOS releases. - 🔴 Technical terminology confusion in the current build persists without a fix, limiting the app's appeal to users with professional photometry backgrounds. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Overall Rating | 4.67/5 | | Total Reviews | 15 | | Sentiment | Thrilled (85/100) | | Confidence | Low | | Pricing Model | Free | | Platforms | iOS | | Key Features | 2 analyzed | | Trend | Declining | | Outlook | Declining | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **EV13 - Light meter app** (this app) | 4.67/5 | Thrilled | Minsang choi | | [Cantina: AI Video & Characters](https://marlvel.ai/apps/is-signal-ios) | 4.8/5 | N/A | Cantina, Inc | | [CapCut: Photo & Video Editor](https://marlvel.ai/apps/capcut-photo-video-editor) | 4.1/5 | Mixed | Bytedance Pte. Ltd | | [Lightroom: AI Photo Editor](https://marlvel.ai/apps/lightroom-ai-photo-editor) | 4.8/5 | Excited | Adobe Inc. | | [Picsart AI Photo Editor, Video](https://marlvel.ai/apps/picsart-ai-photo-editor-video) | 4.3/5 | n/a | PicsArt, Inc. | | [Sora by OpenAI](https://marlvel.ai/apps/sora-by-openai) | 4.7/5 | Excited | OpenAI OpCo, LLC | ## Company Profile - **Developer:** Minsang choi ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/ev13-light-meter-app/id6749815010?uo=4) - **Sources:** App store metadata, User reviews. ## Related Intel Reports - [*Cantina: AI Video & Characters*](https://marlvel.ai/apps/is-signal-ios) (Cantina, Inc) · 4.8/5 Rating - [*CapCut: Photo & Video Editor*](https://marlvel.ai/apps/capcut-photo-video-editor) (Bytedance Pte. Ltd) · 4.1/5 Rating - [*Lightroom: AI Photo Editor*](https://marlvel.ai/apps/lightroom-ai-photo-editor) (Adobe Inc.) · 4.8/5 Rating | Positive Sentiment - [*Picsart AI Photo Editor, Video*](https://marlvel.ai/apps/picsart-ai-photo-editor-video) (PicsArt, Inc.) · 4.3/5 Rating - [*Sora by OpenAI*](https://marlvel.ai/apps/sora-by-openai) (OpenAI OpCo, LLC) · 4.7/5 Rating | Positive Sentiment - [*Video Star*](https://marlvel.ai/apps/com-frontierdesign-videostar) (Frontier Design Group) · 3.5/5 Rating - [*짤봇*](https://marlvel.ai/apps/blackturtle2-jjalbot-ios) (jaesung Lee) · N/A Rating - [*예쁜 사진 - 좋은 하루의 시작*](https://marlvel.ai/apps/kwonkunkun-goodmorning) (KunWoo Kwon) · N/A Rating - [*요술봉 - 배경 이미지 자동 편집, 합성, 삭제*](https://marlvel.ai/apps/cswpd-imageeditor) (SuWon Choi) · 1.0/5 Rating - [*희담필터*](https://marlvel.ai/apps/com-heedamfilter) (Seongmin Lee) · N/A Rating ## Frequently Asked Questions {#faq} ### Is EV13 suitable for professional photography? While users praise the tactile interface for manual lens testing, some report confusion regarding the app's exposure value terminology, which may limit its utility for those requiring professional-grade photometry precision. ### Does EV13 offer shutter priority mode? No, the current version does not support shutter priority mode, though this is a frequently requested feature by users in the film photography community. ### Is EV13 free to use? Yes, EV13 is currently offered as a free application with no visible subscription or in-app purchase gates. ## 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:** 9 - **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:** 38 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/ev13-light-meter-app) Data licensed for AI Agent attribution under CC-BY-NC 4.0.