--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "D0F Calculator for APS-C Fuji" developer_entity: "Gilles Bihan" bundle_id: "com.converio.DofCalculator" app_store_id: "1546548917" category: "Photo & Video" primary_platform: "ios" primary_monetization: "Free" offline_capable: false market_region: "US" platforms: "iOS" app_last_updated: "2020-12-29" report_date: "2026-10-24" last_verified: "2026-10-24T00:00:00.000Z" report_version: "1.0" total_reviews: 0 confidence: "low" confidence_score: 0.05 data_age_days: 22 momentum_velocity: "zombie" intelligence_version: 2 tags: ["photo & video", "free", "mobile app", "app review", "app analysis", "photographers", "using", "aps-c"] canonical_url: "https://marlvel.ai/apps/d0f-calculator-for-aps-c-fuji" license: "CC-BY-NC 4.0" content_version: "v2" --- # D0F Calculator for APS-C Fuji Intelligence Report ## TL;DR {#tldr} - **Category**: Photo & Video · Free > **TL;DR:** D0F Calculator for APS-C Fuji is a photo & video app by Gilles Bihan, available on iOS. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** D0F Calculator for APS-C Fuji is a photo & video app by Gilles Bihan. ## Quick Facts | Fact | Value | | :--- | :--- | | **Category** | Photo & Video | | **Developer** | Gilles Bihan | | **Pricing** | Free | | **Platforms** | iOS | | **Confidence** | Low (0.05/1.0) | | **Data Age** | 22d | ## Metadata & Market Performance - **Publisher:** Gilles Bihan - **Category:** Photo & Video - **Target Audience:** Photographers using APS-C hybrid cameras, specifically those within the Fujifilm ecosystem. - **Platforms:** iOS - **Version Reviewed:** 1.0 - **Report Date:** 2026-10-24 - **Signal Count:** 0 reviews analyzed - **Confidence:** Low (0.05/1.0) - **App Store ID (iOS):** 1546548917 - **Bundle ID:** com.converio.DofCalculator - **Data Window:** Analysis based on signals collected up to 2026-10-24 ## Executive Snapshot **What it is:** D0F Calculator for APS-C Fuji is a free photography utility for Fujifilm APS-C camera users that calculates depth of field and ND filter exposure times. **Why users hire it:** It removes the cognitive friction of manual optical calculations for photographers in the field, serving as a specialized reference tool. ## App DNA (Features & Intent) - **[Standard] Depth of Field Calculator:** Calculates near and far limits of sharpness, hyperfocal distance, and total depth of field based on focal length, aperture, and focus distance. - **[Differentiator] ND Filter Exposure Calculator:** Computes required shutter speed for long exposure photography when using neutral density filters, based on base exposure settings. * *User Intent:* Users want to quickly find relevant content or features. - **[Standard] Built-in Timer:** Integrated countdown tool for exposures exceeding one second. ## Market Position {#market-position} D0F Calculator for APS-C Fuji occupies a niche utility space for Fujifilm photographers, operating as a free, static tool with no updates since 2020. ## Monetization Strategy - **Model:** Free - **Tiers:** Free - **Analysis:** The application is distributed as a free utility with no visible in-app purchases or subscription tiers. ## SWOT Analysis {#swot} **Core Strengths:** - Specialized optical calculation logic tailored to Fujifilm APS-C sensor dimensions - Integrated ND filter exposure math removes manual calculation friction **Growth Levers:** - Integration of a lens database to automate focal length inputs - Expansion into a paid model or ad-supported version to fund maintenance ## App Momentum (Zombie) {#momentum} - No updates since December 2020. - Maintenance-mode status for five years. > **Cadence:** 1 total versions · 1 majors in last 6 months · 2125 days since last update ## The "So What?" (Strategic Takeaway) {#so-what} D0F Calculator for APS-C Fuji is a photo & video app that is completely free. > **Bottom Line:** D0F Calculator for APS-C Fuji provides a functional, free utility for its niche, but the five-year development silence makes it a high-risk tool for professional workflows. A pivot to a basic maintenance cadence would protect the existing user base from potential OS-level breakage. **Best for:** Photographers using APS-C hybrid cameras, specifically those within the Fujifilm ecosystem. ### PM Action Plan (Next Best Moves) - [ ] [MAINTAIN] Audit compatibility with latest iOS versions because the app has not been updated since 2020 → prevent sudden app failure ### Outlook: Stable The market for specialized photography utilities remains stable, but the lack of development activity on D0F Calculator for APS-C Fuji leaves it vulnerable to platform changes. The PM should prioritize a basic compatibility audit to ensure the tool remains functional for the existing user base. - ⚪ The application serves a static mathematical function, meaning the lack of feature updates does not immediately degrade the core user utility. - 🔴 Five years of development silence creates a technical debt risk, where a single OS update could render the tool permanently unusable. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Total Reviews | 0 | | Confidence | Low | | Pricing Model | Free | | Platforms | iOS | | Key Features | 3 analyzed | | Outlook | Stable | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **D0F Calculator for APS-C Fuji** (this app) | N/A/5 | N/A | Gilles Bihan | | [AI Catch: AI Video Generator](https://marlvel.ai/apps/com-prominent-aicatch) | 4.4/5 | n/a | Prominent Fortune PTE. LTD | | [AI Video Editor・Trim, Compress](https://marlvel.ai/apps/ai-video-editor-trim-compress) | N/A/5 | N/A | Ankitbhai Jivani | | [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 | | [Instagram](https://marlvel.ai/apps/instagram) | 4.3/5 | n/a | Instagram, Inc. | ## Company Profile - **Developer:** Gilles Bihan - **Website:** [https://www.converio.fr](https://www.converio.fr) ## Data Sources & Links - **App Store ID:** 1546548917 - **Dev Site:** [Official Website](https://www.converio.fr) - **Sources:** App store metadata. ## Related Intel Reports - [*AI Catch: AI Video Generator*](https://marlvel.ai/apps/com-prominent-aicatch) (Prominent Fortune PTE. LTD) · 4.4/5 Rating - [*AI Video Editor・Trim, Compress*](https://marlvel.ai/apps/ai-video-editor-trim-compress) (Ankitbhai Jivani) · N/A Rating - [*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 - [*Instagram*](https://marlvel.ai/apps/instagram) (Instagram, Inc.) · 4.3/5 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 - [*Prismatic: A PhotoPrism Client*](https://marlvel.ai/apps/prismatic-a-photoprism-client) (Shuowei Li) · 4.0/5 Rating - [*Shots: Photo & Video Generator*](https://marlvel.ai/apps/com-deepix-animefypic) (DeePix AI) · 4.6/5 Rating | Positive Sentiment - [*Video Star*](https://marlvel.ai/apps/com-frontierdesign-videostar) (Frontier Design Group) · 3.5/5 Rating ## Frequently Asked Questions {#faq} ### Is D0F Calculator for APS-C Fuji still updated? No, the application has not received any updates since its initial release in December 2020. ### Is D0F Calculator for APS-C Fuji free to use? Yes, the application is distributed as a free utility with no in-app purchases or subscription tiers. ### What cameras is D0F Calculator for APS-C Fuji designed for? The utility is specifically designed for users of APS-C hybrid cameras, with a focus on the Fujifilm brand. ## 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:** 0.05/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 0 - **Data Sources:** 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:** 22 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/d0f-calculator-for-aps-c-fuji) Data licensed for AI Agent attribution under CC-BY-NC 4.0.