--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "気象庁レーダー - JMA ききくる 天気 weather" developer_entity: "Leon Calcutt" bundle_id: "com.karrileaf.jprainradar" app_store_id: "1036105885" category: "Weather" primary_platform: "ios" primary_monetization: "Free" offline_capable: false market_region: "US" platforms: "iOS & Android" app_last_updated: "2026-08-15" report_date: "2026-08-17" last_verified: "2026-08-17T00:00:00.000Z" report_version: "5.9.3" total_reviews: 0 sentiment: "Thrilled" sentiment_score: 90 confidence: "medium" confidence_score: 0.5 top_praise_theme: "Visualizing weather patterns through radar data helps users plan their daily schedules effectively" review_sample_size: 7 total_review_count: 7 analyzed_review_count: 7 data_age_days: 9 momentum_velocity: "active" intelligence_version: 3 tags: ["weather", "free", "thrilled sentiment", "mobile app", "app review", "app analysis", "residents", "travelers", "japan"] canonical_url: "https://marlvel.ai/apps/jma-weather" license: "CC-BY-NC 4.0" content_version: "v2" --- # 気象庁レーダー - JMA ききくる 天気 weather Intelligence Report ## TL;DR {#tldr} - **Category**: Weather · Free - **Signal**: Sentiment Thrilled - **Recent focus**: Visualizing weather patterns through radar data helps users plan their daily schedules effectively (top praise) > **TL;DR:** 気象庁レーダー - JMA ききくる 天気 weather is a weather app by Leon Calcutt, with Thrilled user sentiment (90/100), available on iOS & Android. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** 気象庁レーダー - JMA ききくる 天気 weather is a weather app by Leon Calcutt. ## Quick Facts | Fact | Value | | :--- | :--- | | **User Mood** | Thrilled | | **Category** | Weather | | **Developer** | Leon Calcutt | | **Pricing** | Free | | **Platforms** | iOS & Android | | **Confidence** | Medium (0.5/1.0) | | **Data Age** | 9d | ## Metadata & Market Performance - **Publisher:** Leon Calcutt - **Category:** Weather - **Target Audience:** Residents and travelers in Japan requiring quick, localized access to JMA weather radar data. - **Platforms:** iOS & Android - **Version Reviewed:** 5.9.3 - **Report Date:** 2026-08-17 - **Signal Count:** 7 reviews analyzed - **Confidence:** Medium (0.5/1.0) - **App Store ID (iOS):** 1036105885 - **Bundle ID:** com.karrileaf.jprainradar - **Google Play ID:** com.karrileaf.jprainradar - **Performance Trend:** Improving - **Data Window:** Analysis based on signals collected up to 2026-08-17 - **Short Description:** daily report meteorological bureau weather app weather jp weather app weather chart weather forecast free popular barometer app rain clouds free atmospheric pressure weather national weather ## Executive Snapshot **What it is:** 気象庁レーダー - JMA ききくる 天気 weather is a specialized weather utility app for iOS and Android that displays real-time JMA radar data for rain and snow. **Why users hire it:** The app removes the friction of manual location entry and complex forecasting, allowing users to verify immediate weather conditions through official data sources instantly. ## App DNA (Features & Intent) - **[Standard] JMA Radar Integration:** Displays real-time rain and snowfall data sourced directly from the Japan Meteorological Agency website. * *User Intent:* Users expect intelligent, adaptive experiences that learn from their behavior. - **[Differentiator] Filmstrip Image Slider:** Allows users to toggle and view map images via a slider interface, increasing time spent in-app. - **[Standard] Location-based Auto-loading:** Automatically detects current location to display relevant weather data without manual input. ## Market Position {#market-position} 気象庁レーダー - JMA ききくる 天気 weather holds a niche position in the Japanese weather category, currently ranking #8 in the Weather category. The app's reliance on ad-supported revenue without IAP tiers signals a focus on broad reach rather than high-ARPU monetization. ## Monetization Strategy - **Model:** Free - **Tiers:** Free with ad support - **Analysis:** Ad-supported model with no IAP or subscription tiers, monetizing 500,000+ installs through ad inventory. ## 🟢 User Sentiment (Medium Confidence: 7 of 7 reviews analyzed) {#user-sentiment} - **Overall Sentiment:** Thrilled ### Top Praises - **Visualizing weather patterns through radar data helps users plan their daily schedules effectively** - **Minimalist interface design allows users to access critical weather information immediately upon opening** - **Specialized snow depth tracking provides high utility for travelers visiting specific regions** ## SWOT Analysis {#swot} **Core Strengths:** - Official JMA data integration builds high-trust barriers - Minimalist UI enables immediate data access **Growth Levers:** - Localized push notifications for weather alerts ## Recent Changes (v2 → v3) {#recent-changes} The developer introduced a new monetization pivot targeting regional tourism ads to increase ARPU, while simultaneously updating the competitive outlook to address the threat of broad-feature weather platforms. **Overall trend**: Improving **Compared at**: 2026-08-17 ### High-impact changes - **[Added] Regional Tourism Ad Pivot** (pricing) ### Medium-impact changes - **[Added] Broad-feature Platform Threat** (swot) - **[Shifted] Competitive Stance** (positioning) ## What's New - **Latest (v5.9.3, 2 days ago):** Introduced a filmstrip-style image slider to streamline map image navigation and viewing. ## App Momentum (Active) {#momentum} - Shipped filmstrip map navigation feature. - Maintains active bi-daily release cadence. > **Cadence:** 2 total versions · 1 majors in last 6 months · 2 days since last update · 4 days avg between updates ## The "So What?" (Strategic Takeaway) {#so-what} 気象庁レーダー - JMA ききくる 天気 weather is a market-leading weather app that is completely free. > **Bottom Line:** 気象庁レーダー - JMA ききくる 天気 weather serves a high-intent audience through official data, but its current manual-check model limits daily engagement. Proactive alerting would shift the app from a secondary utility to an essential daily service, increasing retention against broader competitors. **Best for:** Residents and travelers in Japan requiring quick, localized access to JMA weather radar data. ### PM Action Plan (Next Best Moves) - [ ] [INVEST] Ship push notifications for localized weather alerts because manual radar checks limit daily engagement → increase retention ### Outlook: Stable The Japanese weather utility market is consolidating around high-speed, official data sources. 気象庁レーダー - JMA ききくる 天気 weather is well-positioned to defend its niche, but it must transition from a manual-check tool to a proactive notification service to remain relevant against larger, feature-rich competitors. - 🟢 Active release cadence with recent navigation improvements indicates the developer is maintaining the app's utility rather than letting it stagnate. - ⚪ The ad-supported model remains stable for 500,000+ installs, but the lack of IAP tiers limits revenue scaling potential in the competitive weather market. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Total Reviews | 0 | | Sentiment | Thrilled (90/100) | | Confidence | Medium | | Pricing Model | Free | | Platforms | iOS & Android | | Key Features | 3 analyzed | | Trend | Improving | | Outlook | Stable | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **気象庁レーダー - JMA ききくる 天気 weather** (this app) | N/A/5 | Thrilled | Leon Calcutt | | [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:** Leon Calcutt - **Website:** [https://www.jmaradar.com](https://www.jmaradar.com) ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/jp/app/%E3%81%8D%E3%81%8D%E3%81%8F%E3%82%8B%E5%A4%A9%E6%B0%97%E3%83%AC%E3%83%BC%E3%83%80%E3%83%BC-%E3%82%AD%E3%82%AD%E3%82%AF%E3%83%AB-%E4%BA%88%E5%A0%B1-%E9%9B%A8%E9%9B%B2%E3%81%AE%E5%8B%95%E3%81%8D/id1036105885?uo=2) - **Google Play:** [View on Google Play](https://play.google.com/store/apps/details?id=com.karrileaf.jprainradar&hl=en&gl=us) - **Dev Site:** [Official Website](https://www.jmaradar.com) - **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 気象庁レーダー - JMA ききくる 天気 weather reliable for daily use? Yes, the app sources its rainfall and snowfall data directly from the Japan Meteorological Agency, providing official and accurate information for users in Japan. ### Does this app have intrusive ads? The app uses an ad-supported model to remain free for users. While ads are present, the minimalist design ensures they do not interfere with the primary radar view. ### What is the difference between this and other weather apps? Unlike broader weather apps that focus on social features or long-term forecasts, this app specializes in immediate, official radar data for rain and snow, optimized for quick access. ## 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:** 0.5/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 7 - **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:** 9 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/jma-weather) Data licensed for AI Agent attribution under CC-BY-NC 4.0.