--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Diana" developer_entity: "sorakaze Inc." bundle_id: "jp.itok.iPhone.Diana" app_store_id: "290525991" category: "Weather" primary_platform: "ios" primary_monetization: "Free" offline_capable: false market_region: "US" platforms: "iOS" app_last_updated: "2023-02-12" report_date: "2026-08-22" last_verified: "2026-08-22T00:00:00.000Z" report_version: "4.2.0" total_reviews: 6 overall_rating: 3.5 sentiment: "Mixed" sentiment_score: 45 confidence: "medium" confidence_score: 0.55 top_praise_theme: "The simple and clean interface provides a fast way to view sun and moon cycles" top_complaint_theme: "The introduction of advertisements spoils the previously clean and uncluttered user experience" review_sample_size: 23 total_review_count: 23 analyzed_review_count: 23 data_age_days: 46 momentum_velocity: "zombie" intelligence_version: 3 tags: ["weather", "free", "mixed sentiment", "mobile app", "app review", "app analysis", "astronomy", "enthusiasts", "users"] canonical_url: "https://marlvel.ai/apps/diana" license: "CC-BY-NC 4.0" content_version: "v2" --- # Diana Intelligence Report ## TL;DR {#tldr} - **Category**: Weather · Free - **Signal**: Rating 3.5 · Sentiment Mixed - **Recent focus**: The introduction of advertisements spoils the previously clean and uncluttered user experience (top complaint) · The simple and clean interface provides a fast way to view sun and moon cycles (top praise) > **TL;DR:** Diana is a weather app by sorakaze Inc., rated 3.5/5 by 6 users, with Mixed user sentiment (45/100), available on iOS. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** Diana shows Mixed sentiment (3.5/5 from 6 reviews) - users praise the simple and clean interface provides a fast way to view sun and moon cycles but report issues with the introduction of advertisements spoils the previously clean and uncluttered user experience. ## Quick Facts | Fact | Value | | :--- | :--- | | **Rating** | 3.5/5 (6 reviews) | | **User Mood** | Mixed | | **Category** | Weather | | **Developer** | sorakaze Inc. | | **Pricing** | Free | | **Platforms** | iOS | | **Confidence** | Medium (0.55/1.0) | | **Data Age** | 46d | ## Metadata & Market Performance - **Publisher:** sorakaze Inc. - **Category:** Weather - **Target Audience:** Astronomy enthusiasts and users requiring location-based celestial data for calendar tracking. - **Platforms:** iOS - **Version Reviewed:** 4.2.0 - **Report Date:** 2026-08-22 - **Signal Count:** 23 reviews analyzed - **Confidence:** Medium (0.55/1.0) - **App Store ID (iOS):** 290525991 - **Bundle ID:** jp.itok.iPhone.Diana - **Performance Trend:** Stable - **Data Window:** Analysis based on signals collected up to 2026-08-22 ## Executive Snapshot **What it is:** Diana is a lunar phase and celestial event tracker for iOS that uses GPS or manual location data to display moon cycles and sunrise/sunset times. **Why users hire it:** Users track lunar cycles for astronomy or personal scheduling, and they prefer Diana for its alignment with official observatory data over less precise alternatives. ## App DNA (Features & Intent) - **[Standard] Moon Phase Visualization:** Graphical display of waxing and waning phases based on location data. - **[Standard] Celestial Event Tracking:** Calculates precise rising and setting times for the Sun and Moon. * *User Intent:* Users want visibility into their own performance and progress. ## Market Position {#market-position} Diana maintains a 3.5-star rating across a small sample of reviews. The lack of updates for over 1,200 days places it in a maintenance-only position within the Weather category. ## Monetization Strategy - **Model:** Free - **Tiers:** Free - **Analysis:** Diana operates as a free utility with ad-supported monetization, despite persistent user requests for a paid ad-free tier. ## 🟡 User Sentiment (Medium Confidence: 23 of 23 reviews analyzed) {#user-sentiment} - **Overall Rating:** 3.5/5 - **Platform Split:** iOS 3.5/5 (6 ratings) - **Overall Sentiment:** Mixed ### Top Praises - **The simple and clean interface provides a fast way to view sun and moon cycles** - **Precise astronomical calculations provide reliable data for users checking against official observatory sources** - **iPad specific interface layout provides a comfortable viewing experience for tablet users** ### Top Complaints (Impact Areas) - **The introduction of advertisements spoils the previously clean and uncluttered user experience** ## SWOT Analysis {#swot} **Core Strengths:** - Astronomical calculations match official naval observatory data **Growth Levers:** - Paid ad-free tier would monetize existing user base ## Recent Changes (v2 → v3) {#recent-changes} The app remains in a stagnant maintenance state, with the primary change being the formalization of missing notification features as a key user-requested gap. **Overall trend**: Stable **Compared at**: 2026-08-22 ### High-impact changes - **[Added] Notification Feature Gap** (features) ### Medium-impact changes - **[Shifted] Technical Debt Recognition** (swot) ## What's New - **Latest (v4.2.0, 3 years ago):** Updated external libraries and added support for iOS 16. ## App Momentum (Zombie) {#momentum} - No feature updates for 1,287 days. - Last release updated external libraries only. > **Cadence:** 1 total versions · 0 majors in last 6 months · 1286 days since last update ## The "So What?" (Strategic Takeaway) {#so-what} Diana is a weather app that is completely free. With a 3.5/5 rating from 6 reviews, it shows mixed user reception. > **Bottom Line:** Diana's core astronomical accuracy remains a strong retention hook, but the ad-supported model without a paid alternative is actively eroding the user base. Introducing a paid tier would unlock revenue from the existing loyal audience. **Best for:** Astronomy enthusiasts and users requiring location-based celestial data for calendar tracking. ### PM Action Plan (Next Best Moves) - [ ] [INVEST] Ship a paid ad-free tier because users explicitly request it to restore the clean experience → increase monetization ### Outlook: Declining The celestial utility market is shifting toward feature-rich, notification-driven experiences that Diana currently lacks. Without a pivot to a paid model or a resumption of development, the app will continue to lose its competitive standing to more active rivals. - 🔴 The 1,287-day update gap suggests the app is in maintenance mode, which prevents it from addressing user requests for notification features. - 🔴 User frustration with the introduction of ads into a previously clean interface is driving negative sentiment and app deletions. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Overall Rating | 3.5/5 | | Total Reviews | 6 | | Sentiment | Mixed (45/100) | | Confidence | Medium | | Pricing Model | Free | | Platforms | iOS | | Key Features | 2 analyzed | | Trend | Stable | | Outlook | Declining | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Diana** (this app) | 3.5/5 | Mixed | sorakaze Inc. | | [Bauernkalender](https://marlvel.ai/apps/ch-swift-bauernkalender) | N/A/5 | N/A | Swift Management AG | | [Forecast & What to Wear](https://marlvel.ai/apps/com-appsforparents-weatherforkids) | 4.2/5 | N/A | Natalia Jakubczyk-Gajewska | | [Weather&Clothes](https://marlvel.ai/apps/com-air-weather_and_clothes) | 2.7/5 | N/A | fk.system | | [처음날씨 - 잠금화면 및 알람으로 오늘의 날씨를!](https://marlvel.ai/apps/com-woozuda-weather) | 4.2/5 | N/A | WOOZUDA | | [미세미세 - 미세먼지, 초미세먼지, 날씨](https://marlvel.ai/apps/cheehoon-ha-particulateforecaster-particulateforecaster) | 4.8/5 | Excited | LifeOverflow Inc. | ## Company Profile - **Developer:** sorakaze Inc. - **Website:** [https://moon.bz/](https://moon.bz/) ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/diana/id290525991?uo=4) - **Dev Site:** [Official Website](https://moon.bz/) - **Sources:** Developer website content, App store metadata, User reviews. ## Related Intel Reports - [*Bauernkalender*](https://marlvel.ai/apps/ch-swift-bauernkalender) (Swift Management AG) · N/A Rating - [*Forecast & What to Wear*](https://marlvel.ai/apps/com-appsforparents-weatherforkids) (Natalia Jakubczyk-Gajewska) · 4.2/5 Rating - [*Weather&Clothes*](https://marlvel.ai/apps/com-air-weather_and_clothes) (fk.system) · 2.7/5 Rating - [*처음날씨 - 잠금화면 및 알람으로 오늘의 날씨를!*](https://marlvel.ai/apps/com-woozuda-weather) (WOOZUDA) · 4.2/5 Rating - [*미세미세 - 미세먼지, 초미세먼지, 날씨*](https://marlvel.ai/apps/cheehoon-ha-particulateforecaster-particulateforecaster) (LifeOverflow Inc.) · 4.8/5 Rating | Positive Sentiment - [*너의날씨: 미세먼지, 지도, 레이더, 캐릭터, 위젯*](https://marlvel.ai/apps/kr-guzi-yourweather) (구지랩(GuziLab)) · 5.0/5 Rating - [*ชายฝั่ง รู้ทันระดับน้ำ*](https://marlvel.ai/apps/hii-pttep-chaifang-mobile) (Hydro Informatics Institute) · 4.9/5 Rating - [*ภัยพิบัติไทย*](https://marlvel.ai/apps/biz-harmoniz-earthquake_alert_thai) (Harmoniz InterSoftware) · N/A Rating - [*13abc First Alert Weather*](https://marlvel.ai/apps/com-gray-wtvg-13abc-weather) (Gray Television Group, Inc.) · 4.6/5 Rating - [*13WarnMe*](https://marlvel.ai/apps/13warnme) (Local TV LLC) · 3.0/5 Rating ## Frequently Asked Questions {#faq} ### Is Diana accurate for astronomical planning? Yes, users report that Diana's calculations align with official naval observatory data, making it a reliable tool for celestial tracking. ### Can I remove the advertisements in Diana? Currently, there is no paid option to remove ads. Users have frequently requested this feature, but the developer has not responded to these requests. ### Does Diana provide sunrise or sunset notifications? No, Diana does not currently support notification alerts for sunrise or sunset events, which is a common request among users. ## 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:** 0.55/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 23 - **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:** 46 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/diana) Data licensed for AI Agent attribution under CC-BY-NC 4.0.