--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "LubDub - Heart Sound Recoder" developer_entity: "Anupinder Singh" bundle_id: "com.anupinder.lubdub" app_store_id: "6749350613" category: "Lifestyle" primary_platform: "ios" primary_monetization: "Free" offline_capable: false market_region: "US" platforms: "iOS" app_last_updated: "2025-08-05" report_date: "2026-09-16" last_verified: "2026-09-16T00:00:00.000Z" report_version: "1.0" total_reviews: 0 confidence: "low" confidence_score: 0.05 data_age_days: 15 momentum_velocity: "zombie" intelligence_version: 2 tags: ["lifestyle", "free", "mobile app", "app review", "app analysis", "individuals", "interested", "monitoring"] canonical_url: "https://marlvel.ai/apps/lubdub-heart-sound-recoder" license: "CC-BY-NC 4.0" content_version: "v2" --- # LubDub - Heart Sound Recoder Intelligence Report ## TL;DR {#tldr} - **Category**: Lifestyle · Free > **TL;DR:** LubDub - Heart Sound Recoder is a lifestyle app by Anupinder Singh, available on iOS. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** LubDub - Heart Sound Recoder is a lifestyle app by Anupinder Singh. ## Quick Facts | Fact | Value | | :--- | :--- | | **Category** | Lifestyle | | **Developer** | Anupinder Singh | | **Pricing** | Free | | **Platforms** | iOS | | **Confidence** | Low (0.05/1.0) | | **Data Age** | 15d | ## Metadata & Market Performance - **Publisher:** Anupinder Singh - **Category:** Lifestyle - **Target Audience:** Individuals interested in monitoring or reflecting on their own cardiac rhythm without specialized medical hardware. - **Platforms:** iOS - **Version Reviewed:** 1.0 - **Report Date:** 2026-09-16 - **Signal Count:** 0 reviews analyzed - **Confidence:** Low (0.05/1.0) - **App Store ID (iOS):** 6749350613 - **Bundle ID:** com.anupinder.lubdub - **Data Window:** Analysis based on signals collected up to 2026-09-16 ## Executive Snapshot **What it is:** LubDub is a lifestyle utility for iPhone that captures and filters heart sounds using the device's built-in microphone. **Why users hire it:** The app removes the financial and hardware friction of specialized cardiac monitoring, allowing users to record and reflect on their own heart sounds instantly. ## App DNA (Features & Intent) - **[Differentiator] Heart Sound Recording:** Captures phonocardiograms using the iPhone built-in microphone. - **[Differentiator] Smart Filtering:** Applies digital signal processing to isolate the lub-dub rhythm from ambient noise. * *User Intent:* Users want to quickly find relevant content or features. - **[Standard] Cardiac Rhythm Playback:** Allows users to listen to and reflect on recorded heart sounds. ## Market Position {#market-position} LubDub operates as a niche, free-to-use utility in the Lifestyle category. The absence of a monetization model or recent updates suggests a project currently in maintenance or dormant status. ## Monetization Strategy - **Model:** Free - **Tiers:** Free - **Analysis:** LubDub is distributed as a free utility with no visible in-app purchases or subscription tiers. ## SWOT Analysis {#swot} **Core Strengths:** - Digital signal processing isolates heart sounds without external hardware **Growth Levers:** - Integration with Apple Health could increase long-term utility ## App Momentum (Zombie) {#momentum} - No updates since August 2025. > **Cadence:** 1 total versions · 0 majors in last 6 months · 406 days since last update ## The "So What?" (Strategic Takeaway) {#so-what} LubDub - Heart Sound Recoder is a lifestyle app that is completely free. > **Bottom Line:** LubDub offers a unique, hardware-free mechanism for cardiac reflection, but the 13-month development gap leaves the utility vulnerable to OS-level changes. **Best for:** Individuals interested in monitoring or reflecting on their own cardiac rhythm without specialized medical hardware. ### PM Action Plan (Next Best Moves) - [ ] [MAINTAIN] Audit microphone permissions and core signal processing logic because the app has not been updated in over 13 months → ensure baseline functionality ### Outlook: Declining The personal health utility market is consolidating around apps that offer integrated data tracking and frequent maintenance. LubDub's current dormant state leaves it exposed to technical rot, which will erode its utility for the target audience. - 🔴 The 406-day update gap indicates a dormant development cycle, which will likely lead to technical failure as iOS system requirements evolve. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Total Reviews | 0 | | Confidence | Low | | Pricing Model | Free | | Platforms | iOS | | Key Features | 3 analyzed | | Outlook | Declining | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **LubDub - Heart Sound Recoder** (this app) | N/A/5 | N/A | Anupinder Singh | | [Alarmy - Loud alarm clock](https://marlvel.ai/apps/alarmy-loud-alarm-clock) | 4.8/5 | Excited | Delight Room Co., Ltd. | | [Journey - Diary, Journal](https://marlvel.ai/apps/com-journey-ios-app) | 4.6/5 | Excited | Two App Studio Pte. Ltd. | | [Tinder Dating App: Date & Chat](https://marlvel.ai/apps/tinder-dating-app-date-chat) | 4.0/5 | n/a | Tinder LLC | | [Alarmie: Easy Rise Alarm Clock](https://marlvel.ai/apps/alarmie-easy-rise-alarm-clock) | 4.4/5 | Mixed | Jintian Wang | | [AlarmMon ( alarm clock )](https://marlvel.ai/apps/alarmmon-alarm-clock) | 4.3/5 | n/a | Malang Studio Co. Ltd, | ## Company Profile - **Developer:** Anupinder Singh ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/lubdub-heart-sound-recoder/id6749350613?uo=4) - **Sources:** App store metadata. ## Related Intel Reports - [*Alarmy - Loud alarm clock*](https://marlvel.ai/apps/alarmy-loud-alarm-clock) (Delight Room Co., Ltd.) · 4.8/5 Rating | Positive Sentiment - [*Journey - Diary, Journal*](https://marlvel.ai/apps/com-journey-ios-app) (Two App Studio Pte. Ltd.) · 4.6/5 Rating | Positive Sentiment - [*Tinder Dating App: Date & Chat*](https://marlvel.ai/apps/tinder-dating-app-date-chat) (Tinder LLC) · 4.0/5 Rating - [*Alarmie: Easy Rise Alarm Clock*](https://marlvel.ai/apps/alarmie-easy-rise-alarm-clock) (Jintian Wang) · 4.4/5 Rating - [*AlarmMon ( alarm clock )*](https://marlvel.ai/apps/alarmmon-alarm-clock) (Malang Studio Co. Ltd,) · 4.3/5 Rating - [*Amora: A Hint of Your Soulmate*](https://marlvel.ai/apps/amora-a-hint-of-your-soulmate) (Lit Apps LLC (Mobile)) · 4.6/5 Rating - [*Find My Location: Tracker*](https://marlvel.ai/apps/com-friendslocator) (DIGITS LTD) · 4.2/5 Rating - [*Swiftime*](https://marlvel.ai/apps/swiftime) (MEDIANO Co.,Ltd.) · 4.5/5 Rating | Positive Sentiment - [*마주*](https://marlvel.ai/apps/an-offline-network-where-you-meet-through-qr-codes) (lvher) · N/A Rating - [*모앗*](https://marlvel.ai/apps/moat-moatapp) (JUNSEOK LEE) · N/A Rating ## Frequently Asked Questions {#faq} ### Is LubDub a medical device? LubDub is marketed as a lifestyle utility for personal reflection and is not a substitute for professional medical hardware or diagnosis. ### Does LubDub require extra hardware to record heart sounds? No, LubDub uses the iPhone's built-in microphone to capture heart sounds, requiring no additional devices. ### Is LubDub free to use? Yes, LubDub is currently distributed as a free utility with no in-app purchases or subscription tiers. ## 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:** 15 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/lubdub-heart-sound-recoder) Data licensed for AI Agent attribution under CC-BY-NC 4.0.