--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Biorhythm Plus" developer_entity: "DongHyeon Yun" bundle_id: "com.hycube.free.biorhythm" app_store_id: "1422386816" category: "Utilities" primary_platform: "ios" primary_monetization: "Free" offline_capable: false market_region: "US" platforms: "iOS & Android" app_last_updated: "2026-02-20" report_date: "2026-09-11" last_verified: "2026-09-11T00:00:00.000Z" report_version: "1.3.1" total_reviews: 0 sentiment: "Mixed" sentiment_score: 55 confidence: "medium" confidence_score: 0.45 top_praise_theme: "The core charting functionality provides a clear and useful visual representation of data for users" top_complaint_theme: "The manual date picker forces users to navigate month by month, creating a tedious input experience" review_sample_size: 6 total_review_count: 6 analyzed_review_count: 6 data_age_days: 19 momentum_velocity: "maintenance" intelligence_version: 2 tags: ["utilities", "free", "mixed sentiment", "mobile app", "app review", "app analysis", "individuals", "interested", "personal"] canonical_url: "https://marlvel.ai/apps/biorhythm-plus" license: "CC-BY-NC 4.0" content_version: "v2" --- # Biorhythm Plus Intelligence Report ## TL;DR {#tldr} - **Category**: Utilities · Free - **Signal**: Sentiment Mixed - **Recent focus**: The manual date picker forces users to navigate month by month, creating a tedious input experience (top complaint) · The core charting functionality provides a clear and useful visual representation of data for users (top praise) > **TL;DR:** Biorhythm Plus is a utilities app by DongHyeon Yun, with Mixed user sentiment (55/100), available on iOS & Android. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** Biorhythm Plus is a utilities app by DongHyeon Yun. ## Quick Facts | Fact | Value | | :--- | :--- | | **User Mood** | Mixed | | **Category** | Utilities | | **Developer** | DongHyeon Yun | | **Pricing** | Free | | **Platforms** | iOS & Android | | **Confidence** | Medium (0.45/1.0) | | **Data Age** | 19d | ## Metadata & Market Performance - **Publisher:** DongHyeon Yun - **Category:** Utilities - **Target Audience:** Individuals interested in personal cycle tracking and biorhythm analysis. - **Platforms:** iOS & Android - **Version Reviewed:** 1.3.1 - **Report Date:** 2026-09-11 - **Signal Count:** 6 reviews analyzed - **Confidence:** Medium (0.45/1.0) - **App Store ID (iOS):** 1422386816 - **Bundle ID:** com.hycube.free.biorhythm - **Google Play ID:** com.hycube.free.biorhythm - **Data Window:** Analysis based on signals collected up to 2026-09-11 ## Executive Snapshot **What it is:** Biorhythm Plus is a utility app for iOS and Android that calculates and visualizes personal biorhythm cycles based on user-provided birth dates. **Why users hire it:** The app removes the cognitive load of manual cycle calculation, though the current navigation friction for date selection limits its utility for historical tracking. ## App DNA (Features & Intent) - **[Standard] Biorhythm Calculation:** Calculates physical, emotional, intellectual, and intuitive cycles based on user-provided birth date. * *User Intent:* Users seek enhanced value through premium features. - **[Standard] Date Navigation:** Allows users to view biorhythm data for specific past or future dates via a swipe-based chart interface. ## Market Position {#market-position} Biorhythm Plus occupies a niche utility space with a free, ad-supported model. The lack of recent major feature updates limits its ability to capture share from more active competitors in the personal tracking category. ## Monetization Strategy - **Model:** Free - **Tiers:** Free with ad support - **Analysis:** The app operates on a free, ad-supported model with no in-app purchases or subscription tiers identified. ## 🟡 User Sentiment (Medium Confidence: 6 of 6 reviews analyzed) {#user-sentiment} - **Overall Sentiment:** Mixed ### Top Praises - **The core charting functionality provides a clear and useful visual representation of data for users** ### Top Complaints (Impact Areas) - **The manual date picker forces users to navigate month by month, creating a tedious input experience** ## SWOT Analysis {#swot} **Core Strengths:** - Swipe-based chart interface enables efficient historical and future data exploration **Growth Levers:** - Direct text input for birthdates would resolve the primary user complaint regarding navigation efficiency ## What's New - **Latest (v1.3.1, 10 months ago):** Introduced an iOS-style date picker with swipe-to-navigate functionality, improved screen transitions, and expanded support to 9 languages. ## App Momentum (Maintenance) {#momentum} - Shipped minor UI design updates. - Quiet 10 months, maintenance only. > **Cadence:** 1 total versions · 1 majors in last 6 months · 308 days since last update ## The "So What?" (Strategic Takeaway) {#so-what} Biorhythm Plus is an utilities app that is completely free. > **Bottom Line:** Biorhythm Plus relies on a functional charting engine, but the inefficient date-entry mechanism limits session quality and retention. Prioritizing a direct text-input field would resolve the primary friction point, allowing the app to retain users who currently churn due to navigation fatigue. **Best for:** Individuals interested in personal cycle tracking and biorhythm analysis. ### PM Action Plan (Next Best Moves) - [ ] [INVEST] Ship direct text input for birthdates because it is the top-requested navigation improvement → reduce input friction ### Outlook: Mixed The personal tracking utility market is increasingly favoring apps with high-frequency updates and modern input patterns. Biorhythm Plus remains exposed due to its stagnant development cycle and reliance on legacy navigation, which will likely lead to a gradual decline in active users as more responsive alternatives gain traction. - 🔴 The 10-month development gap suggests the app is in maintenance mode, which limits its ability to compete with active, feature-rich utilities. - 🔴 Persistent user complaints regarding the manual date picker indicate that core usability hurdles remain unaddressed, which compounds the risk of user churn. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Total Reviews | 0 | | Sentiment | Mixed (55/100) | | Confidence | Medium | | Pricing Model | Free | | Platforms | iOS & Android | | Key Features | 2 analyzed | | Outlook | Mixed | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Biorhythm Plus** (this app) | N/A/5 | Mixed | DongHyeon Yun | | [Sota Connect: Secure Network](https://marlvel.ai/apps/fi-catconnect-sota) | 4.8/5 | N/A | Cat Connect | | [V2Box - V2ray Client](https://marlvel.ai/apps/v2box-v2ray-client) | 4.6/5 | n/a | techlaim | | [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 | ## Company Profile - **Developer:** DongHyeon Yun - **Website:** [https://intelli-cell.blogspot.com/](https://intelli-cell.blogspot.com/) ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/biorhythm-plus/id1422386816?uo=4) - **Google Play:** [View on Google Play](https://play.google.com/store/apps/details?id=com.hycube.free.biorhythm&hl=en&gl=us) - **Dev Site:** [Official Website](https://intelli-cell.blogspot.com/) - **Sources:** Developer website content, App store metadata, User reviews. ## Related Intel Reports - [*Sota Connect: Secure Network*](https://marlvel.ai/apps/fi-catconnect-sota) (Cat Connect) · 4.8/5 Rating - [*V2Box - V2ray Client*](https://marlvel.ai/apps/v2box-v2ray-client) (techlaim) · 4.6/5 Rating - [*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 - [*VPN 365-Master WIFI Security*](https://marlvel.ai/apps/vpn-365-master-wifi-security) (vpn fast) · 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 ## Frequently Asked Questions {#faq} ### Is Biorhythm Plus free to use? Yes, Biorhythm Plus is free and supported by advertisements. There are no in-app purchases or subscription tiers available. ### Does Biorhythm Plus allow manual date entry? No, currently the app requires users to navigate through a calendar interface month by month, which some users find tedious for selecting dates far in the past. ### What features does Biorhythm Plus offer for cycle tracking? Biorhythm Plus calculates physical, emotional, intellectual, and intuitive cycles based on a user's birth date and provides a swipe-based chart interface to view these cycles over time. ## 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:** 0.45/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 6 - **Data Sources:** user reviews, developer website, 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:** 19 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/biorhythm-plus) Data licensed for AI Agent attribution under CC-BY-NC 4.0.