--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Biorhythm-365" developer_entity: "Jeonghwan Kim" bundle_id: "net.echoline.biorhythm365Free" app_store_id: "570628630" category: "Lifestyle" primary_platform: "ios" primary_monetization: "Free" offline_capable: false market_region: "US" platforms: "iOS" app_last_updated: "2026-08-14" report_date: "2026-08-26" last_verified: "2026-08-26T00:00:00.000Z" report_version: "7.10" total_reviews: 3863 overall_rating: 4.7 sentiment: "Excited" sentiment_score: 75 confidence: "medium" confidence_score: 0.6 top_praise_theme: "Long-term users value the simple and accurate visualization of daily biorhythm cycles for personal planning" top_complaint_theme: "Recent updates introduced jagged lines and UI regressions that disrupt the previously smooth graph visualization" review_sample_size: 49 total_review_count: 49 analyzed_review_count: 49 data_age_days: 35 momentum_velocity: "maintenance" intelligence_version: 3 tags: ["lifestyle", "free", "excited sentiment", "mobile app", "app review", "app analysis", "individuals", "interested", "tracking"] canonical_url: "https://marlvel.ai/apps/biorhythm-365" license: "CC-BY-NC 4.0" content_version: "v2" --- # Biorhythm-365 Intelligence Report ## TL;DR {#tldr} - **Category**: Lifestyle · Free - **Signal**: Rating 4.72 · Sentiment Excited - **Recent focus**: Recent updates introduced jagged lines and UI regressions that disrupt the previously smooth graph visualization (top complaint) · Long-term users value the simple and accurate visualization of daily biorhythm cycles for personal planning (top praise) > **TL;DR:** Biorhythm-365 is a lifestyle app by Jeonghwan Kim, rated 4.72/5 by 3.9K users, with Excited user sentiment (75/100), available on iOS. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** Biorhythm-365 maintains Excited user sentiment (4.72/5 from 3.9K reviews), with users consistently praising long-term users value the simple and accurate visualization of daily biorhythm cycles for personal planning. ## Quick Facts | Fact | Value | | :--- | :--- | | **Rating** | 4.72/5 (3.9K reviews) | | **User Mood** | Excited | | **Category** | Lifestyle | | **Developer** | Jeonghwan Kim | | **Pricing** | Free | | **Platforms** | iOS | | **Confidence** | Medium (0.6/1.0) | | **Data Age** | 35d | ## Metadata & Market Performance - **Publisher:** Jeonghwan Kim - **Category:** Lifestyle - **Target Audience:** Individuals interested in tracking physiological and emotional cycles for personal scheduling and activity planning. - **Platforms:** iOS - **Version Reviewed:** 7.10 - **Report Date:** 2026-08-26 - **Signal Count:** 49 reviews analyzed - **Confidence:** Medium (0.6/1.0) - **App Store ID (iOS):** 570628630 - **Bundle ID:** net.echoline.biorhythm365Free - **Performance Trend:** Mixed - **Data Window:** Analysis based on signals collected up to 2026-08-26 ## Executive Snapshot **What it is:** Biorhythm-365 is a lifestyle utility for iOS that calculates and graphs physiological, emotional, and intellectual cycles based on user birth dates. **Why users hire it:** Users track these cycles to identify potential efficiency dips or peaks, using the data to inform daily activity planning and avoid unreasonable commitments during projected low-energy periods. ## App DNA (Features & Intent) - **[Standard] Biorhythm Calculation:** Calculates four distinct rhythm cycles using sine wave formulas. - **[Standard] Visual Graphing:** Displays rhythm status from -100 to +100 as visual charts. - **[Standard] Future Preview:** Allows date adjustment to view historical or future projections. * *User Intent:* Users seek enhanced value through premium features. ## Market Position {#market-position} Biorhythm-365 maintains a 4.72 rating across 3,863 total ratings on iOS, positioning it as a stable utility in the lifestyle category. The lack of a paid tier despite user demand for ad removal signals an uncaptured revenue opportunity relative to its consistent install base. ## Monetization Strategy - **Model:** Free - **Tiers:** Completely free - **Analysis:** The app operates as a free utility with no monetization gates, though users request a paid ad-removal option. ## 🟢 User Sentiment (Medium Confidence: 49 of 49 reviews analyzed) {#user-sentiment} - **Overall Rating:** 4.72/5 - **Platform Split:** iOS 4.7/5 (3.9K ratings) - **Overall Sentiment:** Excited ### Top Praises - **Long-term users value the simple and accurate visualization of daily biorhythm cycles for personal planning** - **High contrast graphics and primary colors make the interface easy to read at a glance** ### Top Complaints (Impact Areas) - **Recent updates introduced jagged lines and UI regressions that disrupt the previously smooth graph visualization** ## SWOT Analysis {#swot} **Core Strengths:** - Sine-wave calculation engine provides verifiable logic for cycle projections **Growth Levers:** - One-time ad-removal purchase would capture revenue from power users ## Recent Changes (v2 → v3) {#recent-changes} The competitive outlook shifted from stable to mixed as navigation friction and UI regressions began to threaten the daily user habit. The analyst perspective on monetization also pivoted, moving from viewing the lack of paid tiers as a missed opportunity to identifying it as a potential retention advantage. **Overall trend**: Mixed **Compared at**: 2026-08-26 ### High-impact changes - **[Shifted] Contrarian Take Pivot** (positioning) - **[Declined] Outlook Trend Downgrade** (positioning) ### Medium-impact changes - **[Shifted] SWOT Weakness Consolidation** (swot) ## What's New - **Latest (v7.10, 1 weeks ago):** Routine maintenance and stability updates. ## App Momentum (Maintenance) {#momentum} - Ships routine maintenance updates. - Last release 12 days ago. > **Cadence:** 1 total versions · 0 majors in last 6 months · 12 days since last update ## The "So What?" (Strategic Takeaway) {#so-what} Biorhythm-365 is a market-leading lifestyle app that is completely free. With a 4.72/5 rating from 3.9K reviews, it delivers strong user satisfaction. > **Bottom Line:** Biorhythm-365 retains a loyal base through its core calculation utility, but the recent UI regression threatens the daily habit. Implementing a one-time ad-removal fee would address user requests and unlock revenue without disrupting the current free-tier value proposition. **Best for:** Individuals interested in tracking physiological and emotional cycles for personal scheduling and activity planning. ### PM Action Plan (Next Best Moves) - [ ] [PIVOT] Rebuild graph rendering logic because recent updates introduced jagged lines → restore visual polish ### Outlook: Mixed The lifestyle utility market is shifting toward more interactive, data-rich health tracking, leaving Biorhythm-365's static sine-wave model exposed. Unless the developer addresses the recent UI regressions and adds long-term trend navigation, the app risks losing its core base to more modern, feature-complete alternatives. - 🔴 UI regressions in the latest release erode the daily habit, which compounds the navigation friction already visible in user feedback. - 🟢 High user demand for a paid ad-removal option indicates a strong willingness to pay that remains unaddressed by the current model. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Overall Rating | 4.72/5 | | Total Reviews | 3.9K | | Sentiment | Excited (75/100) | | Confidence | Medium | | Pricing Model | Free | | Platforms | iOS | | Key Features | 3 analyzed | | Trend | Mixed | | Outlook | Mixed | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Biorhythm-365** (this app) | 4.72/5 | Excited | Jeonghwan Kim | | [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:** Jeonghwan Kim - **Website:** [https://echoliner.blogspot.com](https://echoliner.blogspot.com) ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/biorhythm-365/id570628630?uo=4) - **Dev Site:** [Official Website](https://echoliner.blogspot.com) - **Sources:** Developer website content, App store metadata, User reviews. ## 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)) · 4.7/5 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 - [*야기*](https://marlvel.ai/apps/tistory-88yhtserof-yagi) (Yunhwi Lim) · N/A Rating ## Frequently Asked Questions {#faq} ### Is Biorhythm-365 free to use? Yes, Biorhythm-365 is currently a completely free app with no subscription tiers, though users have requested a paid option to remove advertisements. ### Does Biorhythm-365 offer yearly trend views? No, the current version is limited to a thirty-day window, and users have requested the ability to scroll forward and backward to see full-year trends. ### What should I use if I want more than just daily cycles? Users seeking more than daily cycles should look for comprehensive health-tracking apps, as Biorhythm-365 is specialized for physiological and emotional cycle projections. ## 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:** 0.6/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 49 - **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:** 35 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/biorhythm-365) Data licensed for AI Agent attribution under CC-BY-NC 4.0.