--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Sleep Calculator: Cycle Alarm" developer_entity: "凤英 刘" bundle_id: "sleep.cycleCalculator.www" app_store_id: "6747650151" category: "Health & Fitness" primary_platform: "ios" primary_monetization: "Free" offline_capable: false market_region: "US" platforms: "iOS" app_last_updated: "2026-06-15" report_date: "2026-08-12" last_verified: "2026-08-12T00:00:00.000Z" report_version: "1.2.0" total_reviews: 1 overall_rating: 5 sentiment: "Thrilled" sentiment_score: 90 confidence: "low" confidence_score: 0.3 top_praise_theme: "Sleep cycle planning helps users choose optimal wake times based on natural ninety minute intervals" review_sample_size: 1 total_review_count: 1 analyzed_review_count: 1 data_age_days: 49 momentum_velocity: "maintenance" intelligence_version: 3 tags: ["health & fitness", "free", "thrilled sentiment", "mobile app", "app review", "app analysis", "students,", "professionals,", "night"] canonical_url: "https://marlvel.ai/apps/sleep-calculator-cycle-alarm" license: "CC-BY-NC 4.0" content_version: "v2" --- ## ⚠ Content Warning This report covers topics classified as sensitive (health). Information is aggregated from public sources for informational purposes only. This is not medical advice. Consult a qualified professional before acting on any information here. --- # Sleep Calculator: Cycle Alarm Intelligence Report ## TL;DR {#tldr} - **Category**: Health & Fitness · Free - **Signal**: Rating 5 · Sentiment Thrilled - **Recent focus**: Sleep cycle planning helps users choose optimal wake times based on natural ninety minute intervals (top praise) > **TL;DR:** Sleep Calculator: Cycle Alarm is a health & fitness app by 凤英 刘, rated 5/5 by 1 users, with Thrilled user sentiment (90/100), available on iOS. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** Sleep Calculator: Cycle Alarm maintains Thrilled user sentiment (5/5 from 1 review), with users consistently praising sleep cycle planning helps users choose optimal wake times based on natural ninety minute intervals. ## Quick Facts | Fact | Value | | :--- | :--- | | **Rating** | 5/5 (1 review) | | **User Mood** | Thrilled | | **Category** | Health & Fitness | | **Developer** | 凤英 刘 | | **Pricing** | Free | | **Platforms** | iOS | | **Confidence** | Low (0.3/1.0) | | **Data Age** | 49d | ## Metadata & Market Performance - **Publisher:** 凤英 刘 - **Category:** Health & Fitness - **Target Audience:** Students, professionals, and night owls seeking to improve sleep quality through cycle-based scheduling. - **Platforms:** iOS - **Version Reviewed:** 1.2.0 - **Report Date:** 2026-08-12 - **Signal Count:** 1 review analyzed - **Confidence:** Low (0.3/1.0) - **App Store ID (iOS):** 6747650151 - **Bundle ID:** sleep.cycleCalculator.www - **Performance Trend:** Stable - **Data Window:** Analysis based on signals collected up to 2026-08-12 ## Executive Snapshot **What it is:** Sleep Calculator: Cycle Alarm is a health utility for iOS that calculates optimal sleep schedules based on 90-minute cycles. **Why users hire it:** Users hire this app to minimize morning grogginess by aligning their sleep patterns with biological rhythms. ## App DNA (Features & Intent) - **[Standard] Sleep Cycle Calculator:** Calculates wake-up or bedtime based on 90-minute sleep cycles to minimize grogginess. - **[Standard] Smart Reminders:** Configurable alerts to notify users of their ideal sleep window. * *User Intent:* Users want timely prompts to stay engaged without missing updates. - **[Standard] Calming Sleep Sounds:** Audio library for sleep induction. ## Market Position {#market-position} The app maintains a 5.0-star rating on the iOS platform, though its single-review count indicates limited market penetration. The lack of monetization relative to category norms suggests a non-commercial positioning. ## Monetization Strategy - **Model:** Free - **Tiers:** Free - **Analysis:** The app is currently listed as free with no explicit subscription or IAP tiers identified, limiting revenue potential. ## 🟢 User Sentiment (Low Confidence: 1 of 1 review analyzed) {#user-sentiment} - **Overall Rating:** 5/5 - **Platform Split:** iOS 5.0/5 (1 ratings) - **Overall Sentiment:** Thrilled ### Top Praises - **Sleep cycle planning helps users choose optimal wake times based on natural ninety minute intervals** ## SWOT Analysis {#swot} **Core Strengths:** - 90-minute cycle calculation logic provides a clear, science-backed utility **Growth Levers:** - Integration with wearable health devices could provide a B2B distribution barrier ## Recent Changes (v2 → v3) {#recent-changes} The app's competitive assessment shifted from a focus on feature utility to a critique of its non-commercial, maintenance-heavy business model. **Overall trend**: Stable **Compared at**: 2026-08-12 ### High-impact changes - **[Shifted] Monetization Risk Assessment** (swot) ### Medium-impact changes - **[Shifted] Market Posture Pivot** (positioning) - **[Improved] Strategic Opportunity Framing** (swot) ## What's New - **Latest (v1.2.0, 1 months ago):** Redesigned UI for a cleaner, more elegant sleep tracking experience. ## App Momentum (Maintenance) {#momentum} - Redesigned UI in latest release. - Ships ~1 major update per year. > **Cadence:** 1 total versions · 1 majors in last 6 months · 58 days since last update ## The "So What?" (Strategic Takeaway) {#so-what} Sleep Calculator: Cycle Alarm is a health & fitness app that is completely free. It holds a 5/5 rating from 1 review. > **Bottom Line:** Sleep Calculator: Cycle Alarm offers a focused utility for cycle-based sleep planning, but the lack of a monetization strategy and infrequent updates create a high risk of obsolescence, so the PM should prioritize a pilot IAP or subscription test to validate revenue potential. **Best for:** Students, professionals, and night owls seeking to improve sleep quality through cycle-based scheduling. ### PM Action Plan (Next Best Moves) - [ ] [INVEST] Pilot a premium subscription tier because the current free model lacks revenue to fund development → increase LTV ### Outlook: Stable Users report: The health and fitness category is consolidating around apps that offer integrated wearable data, leaving standalone calculators like this one exposed to churn. Without a clear revenue stream to fund hardware integrations, the app will likely struggle to retain power users who migrate to more comprehensive health platforms. - ⚪ The latest update (v1.2.0) focused on UI refinement, signaling a maintenance-first posture rather than aggressive feature expansion. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Overall Rating | 5/5 | | Total Reviews | 1 | | 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 | | :--- | :--- | :--- | :--- | | **Sleep Calculator: Cycle Alarm** (this app) | 5/5 | Thrilled | 凤英 刘 | | [GoTall - Height Predictor](https://marlvel.ai/apps/gotall-height-predictor) | 4.6/5 | n/a | Grow Labs LLC | | [Mind - Méditations guidées](https://marlvel.ai/apps/mind-m-ditations-guid-es) | 4.6/5 | Excited | MIND AND CIE | | [Strava: Run, Bike, Walk](https://marlvel.ai/apps/strava-run-bike-walk) | 4.7/5 | n/a | Strava, Inc. | | [Taller AI: Height Maximizer](https://marlvel.ai/apps/taller-ai-height-maximizer) | 4.7/5 | Excited | Leadimize | | [TallerTeen - Grow Taller Now](https://marlvel.ai/apps/tallerteen-grow-taller-now) | 4.7/5 | n/a | Viral App Developement LLC | ## Company Profile - **Developer:** 凤英 刘 ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/sleep-calculator-cycle-alarm/id6747650151?uo=4) - **Sources:** App store metadata, User reviews. ## Related Intel Reports - [*GoTall - Height Predictor*](https://marlvel.ai/apps/gotall-height-predictor) (Grow Labs LLC) · 4.6/5 Rating - [*Mind - Méditations guidées*](https://marlvel.ai/apps/mind-m-ditations-guid-es) (MIND AND CIE) · 4.6/5 Rating | Positive Sentiment - [*Strava: Run, Bike, Walk*](https://marlvel.ai/apps/strava-run-bike-walk) (Strava, Inc.) · 4.7/5 Rating - [*Taller AI: Height Maximizer*](https://marlvel.ai/apps/taller-ai-height-maximizer) (Leadimize) · 4.7/5 Rating | Positive Sentiment - [*TallerTeen - Grow Taller Now*](https://marlvel.ai/apps/tallerteen-grow-taller-now) (Viral App Developement LLC) · 4.7/5 Rating - [*Activity Tracker・FitnessView*](https://marlvel.ai/apps/activity-tracker-fitnessview) (Funn Media, LLC) · 4.0/5 Rating - [*Avatran Soul*](https://marlvel.ai/apps/avatran-soul) (Avatran GmbH) · N/A Rating - [*Bubblic: Connect with people.*](https://marlvel.ai/apps/bubblic-connect-with-people) (Bubblic Inc.) · 4.6/5 Rating | Positive Sentiment - [*evolum - Meditation & Yoga*](https://marlvel.ai/apps/evolum-meditation-yoga) (Evolum) · 4.7/5 Rating | Positive Sentiment - [*Holoholo: Daily Memories*](https://marlvel.ai/apps/holoholo-daily-memories) (For Pedestrians LLC.) · 4.4/5 Rating ## 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:** 49 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/sleep-calculator-cycle-alarm) Data licensed for AI Agent attribution under CC-BY-NC 4.0.