--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Sleep Diary App" developer_entity: "Alexander Ivanov" bundle_id: "com.alexivanov.luna" app_store_id: "964733439" category: "Health & Fitness" primary_platform: "ios" primary_monetization: "Free" offline_capable: false market_region: "US" platforms: "iOS" app_last_updated: "2020-04-24" report_date: "2026-09-01" last_verified: "2026-09-01T00:00:00.000Z" report_version: "2.2" total_reviews: 24 overall_rating: 3.5 sentiment: "Mixed" sentiment_score: 55 confidence: "medium" confidence_score: 0.45 top_praise_theme: "Simple and elegant interface design allows users to track sleep duration without complex setup steps" top_complaint_theme: "Frequent application crashes and recording failures prevent users from capturing accurate sleep data overnight" review_sample_size: 31 total_review_count: 31 analyzed_review_count: 31 data_age_days: 6 momentum_velocity: "zombie" intelligence_version: 3 tags: ["health & fitness", "free", "mixed sentiment", "mobile app", "app review", "app analysis", "health-conscious", "individuals", "using"] canonical_url: "https://marlvel.ai/apps/sleep-diary-app" 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 Diary App Intelligence Report ## TL;DR {#tldr} - **Category**: Health & Fitness · Free - **Signal**: Rating 3.54 · Sentiment Mixed - **Recent focus**: Users report: Frequent application crashes and recording failures prevent users from capturing accurate sleep data overnight (top complaint) · Simple and elegant interface design allows users to track sleep duration without complex setup steps (top praise) > **TL;DR:** Sleep Diary App is a health & fitness app by Alexander Ivanov, rated 3.54/5 by 24 users, with Mixed user sentiment (55/100), available on iOS. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** Sleep Diary App shows Mixed sentiment (3.54/5 from 24 reviews) - users praise simple and elegant interface design allows users to track sleep duration without complex setup steps but report issues with frequent application crashes and recording failures prevent users from capturing accurate sleep data overnight. ## Quick Facts | Fact | Value | | :--- | :--- | | **Rating** | 3.54/5 (24 reviews) | | **User Mood** | Mixed | | **Category** | Health & Fitness | | **Developer** | Alexander Ivanov | | **Pricing** | Free | | **Platforms** | iOS | | **Confidence** | Medium (0.45/1.0) | | **Data Age** | 6d | ## Metadata & Market Performance - **Publisher:** Alexander Ivanov - **Category:** Health & Fitness - **Target Audience:** Health-conscious individuals using Apple devices who want to track sleep duration without purchasing dedicated sleep-tracking hardware. - **Platforms:** iOS - **Version Reviewed:** 2.2 - **Report Date:** 2026-09-01 - **Signal Count:** 31 reviews analyzed - **Confidence:** Medium (0.45/1.0) - **App Store ID (iOS):** 964733439 - **Bundle ID:** com.alexivanov.luna - **Performance Trend:** Stable - **Data Window:** Analysis based on signals collected up to 2026-09-01 ## Executive Snapshot **What it is:** Sleep Diary App is a manual sleep-tracking utility for iOS that integrates with Apple Health to record sleep duration. **Why users hire it:** The app removes the requirement for wearable hardware, allowing users to log sleep patterns manually through a simple interface. ## App DNA (Features & Intent) - **[Standard] Apple Health Integration:** Synchronizes sleep duration logs with the system-level Health app for centralized data tracking. * *User Intent:* Users expect seamless access across multiple devices. - **[Basic] Manual Sleep Logging:** Provides a manual interface to record sleep duration without requiring external wearable hardware. * *User Intent:* Users seek enhanced value through premium features. - **[Differentiator] Atmospheric Pressure Monitoring:** Tracks changes in barometric pressure during sleep cycles for iPhone 6 users. * *User Intent:* Users want visibility into their own performance and progress. ## Market Position {#market-position} Sleep Diary App occupies a legacy utility position in the Health & Fitness category, maintaining a 3.5-star rating across 24 reviews. The absence of updates for over 2,300 days signals a maintenance-mode posture that leaves the app vulnerable to modern, automated competitors. ## Monetization Strategy - **Model:** Free - **Tiers:** Free - **Analysis:** The app operates as a free utility with no visible subscription or in-app purchase gates. ## 🟡 User Sentiment (Medium Confidence: 31 of 31 reviews analyzed) {#user-sentiment} - **Overall Rating:** 3.54/5 - **Platform Split:** iOS 3.5/5 (24 ratings) - **Overall Sentiment:** Mixed ### Top Praises - **Simple and elegant interface design allows users to track sleep duration without complex setup steps** - **Integration with health services provides users with detailed insights into sleep patterns and heart rate** - **Manual tracking functionality provides a reliable alternative for users who prefer not to wear watches** ### Top Complaints (Impact Areas) - **Users report: Frequent application crashes and recording failures prevent users from capturing accurate sleep data overnight** ## SWOT Analysis {#swot} **Core Strengths:** - Manual logging interface provides a low-friction entry point for users avoiding wearable hardware **Growth Levers:** - Developing a home screen widget would address the top-requested feature for nightly convenience ## What's New - **Latest (v2.2, 6 years ago):** Introduced a circular gauge complication for watch faces. ## App Momentum (Zombie) {#momentum} - No updates in over six years. - Development remains in maintenance mode. > **Cadence:** 1 total versions · 1 majors in last 6 months · 2320 days since last update ## The "So What?" (Strategic Takeaway) {#so-what} Sleep Diary App is a health & fitness app that is completely free. With a 3.54/5 rating from 24 reviews, it shows mixed user reception. > **Bottom Line:** Sleep Diary App serves as a basic manual utility, but the lack of development since 2020 leaves it unable to compete with automated alternatives. The PM should prioritize stability fixes to address the crash-prone user experience, which currently erodes the core tracking habit. **Best for:** Health-conscious individuals using Apple devices who want to track sleep duration without purchasing dedicated sleep-tracking hardware. ### PM Action Plan (Next Best Moves) - [ ] [MAINTAIN] Audit crash logs and ship stability patches because frequent crashes are the top complaint → stabilize the core tracking habit ### Outlook: Declining The health-tracking market has consolidated around automated, sensor-driven solutions, leaving manual-entry utilities like Sleep Diary App increasingly obsolete. Without a shift to active development or a pivot to a niche manual-tracking audience, the app will continue to lose relevance as its technical debt compounds. - 🔴 The six-year development gap indicates the app is in maintenance mode, which prevents it from addressing modern user expectations for automated tracking. - 🔴 Persistent crash reports and recording inaccuracies in the latest version erode user trust, leading to a declining sentiment trend. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Overall Rating | 3.54/5 | | Total Reviews | 24 | | Sentiment | Mixed (55/100) | | Confidence | Medium | | Pricing Model | Free | | Platforms | iOS | | Key Features | 3 analyzed | | Trend | Stable | | Outlook | Declining | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Sleep Diary App** (this app) | 3.54/5 | Mixed | Alexander Ivanov | | [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:** Alexander Ivanov ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/sleep-diary-app/id964733439?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 | Excellent 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:** 0.45/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 31 - **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:** 6 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/sleep-diary-app) Data licensed for AI Agent attribution under CC-BY-NC 4.0.