--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Corbyn Running Calculator - A run time calculator" developer_entity: "Mark Corbyn" bundle_id: "org.markcorbyn.TimeCalculator" app_store_id: "1131152928" category: "Utilities" primary_platform: "ios" primary_monetization: "Free" offline_capable: false market_region: "US" platforms: "iOS" app_last_updated: "2017-06-26" report_date: "2026-08-15" last_verified: "2026-08-15T00:00:00.000Z" report_version: "1.1" total_reviews: 2 overall_rating: 5 confidence: "low" confidence_score: 0.05 data_age_days: 47 momentum_velocity: "zombie" intelligence_version: 3 tags: ["utilities", "free", "mobile app", "app review", "app analysis", "runners", "perform", "training"] canonical_url: "https://marlvel.ai/apps/corbyn-running-calculator-a-run-time-calculator" license: "CC-BY-NC 4.0" content_version: "v2" --- # Corbyn Running Calculator - A run time calculator Intelligence Report ## TL;DR {#tldr} - **Category**: Utilities · Free - **Signal**: Rating 5 > **TL;DR:** Corbyn Running Calculator - A run time calculator is a utilities app by Mark Corbyn, rated 5/5 by 2 users, available on iOS. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** Corbyn Running Calculator - A run time calculator is a utilities app by Mark Corbyn. ## Quick Facts | Fact | Value | | :--- | :--- | | **Rating** | 5/5 (2 reviews) | | **Category** | Utilities | | **Developer** | Mark Corbyn | | **Pricing** | Free | | **Platforms** | iOS | | **Confidence** | Low (0.05/1.0) | | **Data Age** | 47d | ## Metadata & Market Performance - **Publisher:** Mark Corbyn - **Category:** Utilities - **Target Audience:** Runners who need to perform training and race pace calculations quickly without manual math. - **Platforms:** iOS - **Version Reviewed:** 1.1 - **Report Date:** 2026-08-15 - **Signal Count:** 0 reviews analyzed - **Confidence:** Low (0.05/1.0) - **App Store ID (iOS):** 1131152928 - **Bundle ID:** org.markcorbyn.TimeCalculator - **Performance Trend:** Stable - **Data Window:** Analysis based on signals collected up to 2026-08-15 ## Executive Snapshot **What it is:** Corbyn Running Calculator is a specialized utility for runners to perform race pace, interval, and distance calculations on iOS. **Why users hire it:** It removes the time-consuming friction of manual math during training sessions, serving runners who prefer a dedicated, focused calculation tool over complex fitness trackers. ## App DNA (Features & Intent) - **[Standard] Race Pace Calculator:** Calculates required pace for a specific target race time and distance. - **[Differentiator] Interval Split Calculator:** Computes average rep time for multiple interval session segments. - **[Differentiator] Competitor Pace Analysis:** Reverse-engineers the pace required for a competitor to achieve a specific finish time. * *User Intent:* Users are driven by competitive achievement and recognition. ## Market Position {#market-position} Corbyn Running Calculator maintains a niche presence as a free utility with a 5-star rating based on a small sample of 2 reviews. Its lack of updates since 2017 places it outside the competitive cycle of modern, wearable-integrated training tools. ## Monetization Strategy - **Model:** Free - **Tiers:** Fully free utility - **Analysis:** The app operates as a free, ad-free utility with no monetization gates. ## SWOT Analysis {#swot} **Core Strengths:** - Focused utility for specific running calculations **Growth Levers:** - Add export function for training logs ## Recent Changes (v2 → v3) {#recent-changes} The app's development status remains unchanged, but internal strategic planning has shifted from a recommendation to sunset the product to a requirement for a feature parity audit. **Overall trend**: Stable **Compared at**: 2026-08-15 ### High-impact changes - **[Shifted] Strategic Recommendation** (positioning) ### Medium-impact changes - **[Added] Wearable Integration Weakness** (swot) ## What's New - **Latest (v1.1, 9 years ago):** Renamed to Corbyn Running Calculator, updated for iOS 11 compatibility, and improved accessibility for visually impaired users. ## App Momentum (Zombie) {#momentum} - Dormant development for nine years. - No feature updates since 2017. > **Cadence:** 1 total versions · 1 majors in last 6 months · 3336 days since last update ## The "So What?" (Strategic Takeaway) {#so-what} Corbyn Running Calculator - A run time calculator is an utilities app that is completely free. It holds a 5/5 rating from 2 reviews. > **Bottom Line:** Corbyn Running Calculator serves a specific manual-entry need, but its nine-year development gap makes it a legacy tool in a market that now demands automated wearable integration. **Best for:** Runners who need to perform training and race pace calculations quickly without manual math. ### PM Action Plan (Next Best Moves) - [ ] [PIVOT] Audit feature parity against current training apps because the nine-year update gap risks total obsolescence → determine if a pivot is viable ### Outlook: Declining The fitness utility market is consolidating around apps that offer automated data sync and wearable integration. Corbyn Running Calculator remains in maintenance mode, which will likely lead to further decline as users migrate to tools that reduce manual input. - 🔴 The nine-year development hiatus prevents integration with current iOS standards and wearable ecosystems, leading to inevitable user attrition. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Overall Rating | 5/5 | | Total Reviews | 2 | | Confidence | Low | | Pricing Model | Free | | Platforms | iOS | | Key Features | 3 analyzed | | Trend | Stable | | Outlook | Declining | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Corbyn Running Calculator - A run time calculator** (this app) | 5/5 | N/A | Mark Corbyn | | [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) | 4.4/5 | Mixed | Fuxin Technology | | [Potatso](https://marlvel.ai/apps/potatso) | 4.4/5 | n/a | Potatso Lab LTD | | [Quantumult X](https://marlvel.ai/apps/quantumult-x) | 3.8/5 | N/A | Cross Utility Ltd | ## Company Profile - **Developer:** Mark Corbyn ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/corbyn-running-calculator-a-run-time-calculator/id1131152928?uo=4) - **Sources:** App store metadata. ## Related Intel Reports - [*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) · 4.4/5 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 - [*Sota Connect: Secure Network*](https://marlvel.ai/apps/fi-catconnect-sota) (Cat Connect) · 4.9/5 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 Corbyn Running Calculator free to use? Yes, Corbyn Running Calculator is a fully free, ad-free utility with no subscription or monetization gates. ### Does Corbyn Running Calculator sync with my running watch? No, Corbyn Running Calculator does not offer integration with wearable devices or automatic data syncing. It is designed as a manual calculation tool. ### What is the difference between this and a standard fitness tracker? Corbyn Running Calculator is a specialized tool for calculating specific race and interval metrics, whereas standard fitness trackers focus on tracking activity, GPS data, and long-term health metrics. ## 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:** 47 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/corbyn-running-calculator-a-run-time-calculator) Data licensed for AI Agent attribution under CC-BY-NC 4.0.