--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "DoF Calculator" developer_entity: "永晓 邵" bundle_id: "ron.shao.HyperfocalCalculator" app_store_id: "6742732770" category: "Photo & Video" primary_platform: "ios" primary_monetization: "Free" offline_capable: false market_region: "US" platforms: "iOS" app_last_updated: "2026-02-01" report_date: "2026-08-28" last_verified: "2026-08-28T00:00:00.000Z" report_version: "1.1.3" total_reviews: 33 overall_rating: 4.7 sentiment: "Thrilled" sentiment_score: 90 confidence: "low" confidence_score: 0.3 top_praise_theme: "The simple and accessible user interface allows for immediate engagement without a steep learning curve" review_sample_size: 1 total_review_count: 1 analyzed_review_count: 1 data_age_days: 33 momentum_velocity: "maintenance" intelligence_version: 3 tags: ["photo & video", "free", "thrilled sentiment", "mobile app", "app review", "app analysis", "photographers", "requiring", "precise"] canonical_url: "https://marlvel.ai/apps/dof-calculator-1" license: "CC-BY-NC 4.0" content_version: "v2" --- # DoF Calculator Intelligence Report ## TL;DR {#tldr} - **Category**: Photo & Video · Free - **Signal**: Rating 4.67 · Sentiment Thrilled - **Recent focus**: The simple and accessible user interface allows for immediate engagement without a steep learning curve (top praise) > **TL;DR:** DoF Calculator is a photo & video app by 永晓 邵, rated 4.67/5 by 33 users, with Thrilled user sentiment (90/100), available on iOS. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** DoF Calculator maintains Thrilled user sentiment (4.67/5 from 33 reviews), with users consistently praising the simple and accessible user interface allows for immediate engagement without a steep learning curve. ## Quick Facts | Fact | Value | | :--- | :--- | | **Rating** | 4.67/5 (33 reviews) | | **User Mood** | Thrilled | | **Category** | Photo & Video | | **Developer** | 永晓 邵 | | **Pricing** | Free | | **Platforms** | iOS | | **Confidence** | Low (0.3/1.0) | | **Data Age** | 33d | ## Metadata & Market Performance - **Publisher:** 永晓 邵 - **Category:** Photo & Video - **Target Audience:** Photographers requiring precise depth of field calculations for specific print or display output conditions. - **Platforms:** iOS - **Version Reviewed:** 1.1.3 - **Report Date:** 2026-08-28 - **Signal Count:** 1 review analyzed - **Confidence:** Low (0.3/1.0) - **App Store ID (iOS):** 6742732770 - **Bundle ID:** ron.shao.HyperfocalCalculator - **Performance Trend:** Stable - **Data Window:** Analysis based on signals collected up to 2026-08-28 ## Executive Snapshot **What it is:** DoF Calculator is a photography utility for calculating depth of field and hyperfocal distance on iOS. **Why users hire it:** It removes the cognitive friction of manual optical calculations for photographers preparing for specific print or high-resolution display outputs. ## App DNA (Features & Intent) - **[Standard] Depth of Field Calculation:** Calculates near and far depth of field based on sensor format, aperture, focal length, and focus distance. - **[Standard] Hyperfocal Distance Tool:** Automatically computes optimal focus distance for current camera settings. - **[Differentiator] Manual Circle of Confusion Adjustment:** Allows custom input of circle of confusion values for specific print sizes or high-resolution display requirements. * *User Intent:* Users value self-expression and personalized experiences. ## Market Position {#market-position} DoF Calculator maintains a 4.67-star rating across 33 ratings on iOS. The free-to-use model without in-app purchases differentiates it from category rivals that gate advanced optical settings behind subscription tiers. ## Monetization Strategy - **Model:** Free - **Tiers:** Free - **Analysis:** The app is currently offered as a free utility without visible subscription or in-app purchase gates. ## 🟢 User Sentiment (Low Confidence: 1 of 1 review analyzed) {#user-sentiment} - **Overall Rating:** 4.67/5 - **Platform Split:** iOS 4.7/5 (33 ratings) - **Overall Sentiment:** Thrilled ### Top Praises - **The simple and accessible user interface allows for immediate engagement without a steep learning curve** ## SWOT Analysis {#swot} **Core Strengths:** - Manual circle of confusion adjustment provides a technical edge for print-focused users. **Growth Levers:** - Localized terminology refinements could support expansion into non-English speaking photography markets. ## Recent Changes (v2 → v3) {#recent-changes} The competitive narrative shifted from viewing the app's maintenance-mode status as a vulnerability to framing its free-to-use model as a defensive barrier against paid competitors. No functional or pricing changes occurred, as the app remains in a 7-month update dormancy. **Overall trend**: Stable **Compared at**: 2026-08-28 ### High-impact changes - **[Shifted] Monetization as Defensive Barrier** (positioning) ### Medium-impact changes - **[Shifted] Threat Reclassification** (swot) ## What's New - **Latest (v1.1.3, 6 months ago):** Refined translations and localized terminology for improved reading experience. ## App Momentum (Maintenance) {#momentum} - Ships translation refinements in latest release. - Maintains 7-month update dormancy. > **Cadence:** 1 total versions · 0 majors in last 6 months · 207 days since last update ## The "So What?" (Strategic Takeaway) {#so-what} DoF Calculator is a photo & video app that is completely free. It holds a 4.67/5 rating from 33 reviews. > **Bottom Line:** DoF Calculator serves a stable, niche audience through its specialized manual controls, but the current maintenance-only cadence risks obsolescence as rivals iterate on community-driven features. **Best for:** Photographers requiring precise depth of field calculations for specific print or display output conditions. ### PM Action Plan (Next Best Moves) - [ ] [MAINTAIN] Audit UI for accessibility improvements because the clean interface is the top-cited praise → maintain 4.67-star rating baseline ### Outlook: Stable The photography utility market is consolidating around apps that offer community-sharing and cloud-sync features, which DoF Calculator currently lacks. Maintaining a stable, free-to-use tool without monetization pressure allows it to retain its niche audience, provided the core calculation logic remains accurate for modern sensor formats. - ⚪ The latest update focused on translation refinements, confirming a maintenance-only cadence that avoids feature expansion but preserves existing utility. - 🟢 High user satisfaction with the current interface suggests the core utility meets the needs of the target audience without requiring frequent changes. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Overall Rating | 4.67/5 | | Total Reviews | 33 | | Sentiment | Thrilled (90/100) | | Confidence | Low | | Pricing Model | Free | | Platforms | iOS | | Key Features | 3 analyzed | | Trend | Stable | | Outlook | Stable | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **DoF Calculator** (this app) | 4.67/5 | Thrilled | 永晓 邵 | | [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:** 永晓 邵 ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/dof-calculator/id6742732770?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 DoF Calculator free to use? Yes, DoF Calculator is currently offered as a free utility with no subscription gates or in-app purchases. ### Does DoF Calculator support custom circle of confusion values? Yes, the app allows manual adjustment of the circle of confusion, which is useful for specific print sizes or high-resolution display requirements. ### Is DoF Calculator suitable for professional photography? The app provides professional-grade depth of field and hyperfocal distance calculations, making it a useful technical reference for photographers requiring precise output conditions. ## 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:** 33 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/dof-calculator-1) Data licensed for AI Agent attribution under CC-BY-NC 4.0.