--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Day & Night Map" developer_entity: "Volker Voecking Software Engineering" bundle_id: "com.vvse.daynightmap" app_store_id: "741375889" google_play_id: "com.vvse.daynight" category: "Weather" primary_platform: "ios" primary_monetization: "Freemium" offline_capable: false market_region: "US" platforms: "iOS & Android" app_last_updated: "2026-09-14" report_date: "2026-09-28" last_verified: "2026-09-28T00:00:00.000Z" report_version: "3.6.2" total_reviews: 3960 overall_rating: 4.8 sentiment: "Thrilled" sentiment_score: 85 confidence: "medium" confidence_score: 0.55 top_praise_theme: "Visualizing the day and night terminator line helps radio enthusiasts plan long-distance communication propagation" top_complaint_theme: "Occasional UI layout conflicts on specific devices prevent users from accessing the date adjustment controls" review_sample_size: 80 total_review_count: 80 analyzed_review_count: 60 data_age_days: 3 momentum_velocity: "maintenance" intelligence_version: 2 tags: ["weather", "freemium", "thrilled sentiment", "mobile app", "app review", "app analysis", "travellers,", "astronomers,", "photographers,"] canonical_url: "https://marlvel.ai/apps/day-night-map" license: "CC-BY-NC 4.0" content_version: "v2" --- # Day & Night Map Intelligence Report ## TL;DR {#tldr} - **Category**: Weather · Freemium - **Signal**: Rating 4.79 · Sentiment Thrilled - **Recent focus**: Occasional UI layout conflicts on specific devices prevent users from accessing the date adjustment controls (top complaint) · Visualizing the day and night terminator line helps radio enthusiasts plan long-distance communication propagation (top praise) > **TL;DR:** Day & Night Map is a weather app by Volker Voecking Software Engineering, rated 4.79/5 by 4K users, with Thrilled user sentiment (85/100), available on iOS & Android. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** Day & Night Map maintains Thrilled user sentiment (4.79/5 from 4K reviews), with users consistently praising visualizing the day and night terminator line helps radio enthusiasts plan long-distance communication propagation. ## Quick Facts | Fact | Value | | :--- | :--- | | **Rating** | 4.79/5 (4K reviews) | | **User Mood** | Thrilled | | **Category** | Weather | | **Developer** | Volker Voecking Software Engineering | | **Pricing** | Freemium | | **Platforms** | iOS & Android | | **Confidence** | Medium (0.55/1.0) | | **Data Age** | 3d | ## Metadata & Market Performance - **Publisher:** Volker Voecking Software Engineering - **Category:** Weather - **Target Audience:** Travellers, astronomers, photographers, and educators interested in solar and lunar positioning. - **Platforms:** iOS & Android - **Version Reviewed:** 5.5.2 - **Report Date:** 2026-09-28 - **Signal Count:** 80 reviews analyzed - **Confidence:** Medium (0.55/1.0) - **App Store ID (iOS):** 741375889 - **Bundle ID:** com.vvse.daynightmap - **Google Play ID:** com.vvse.daynight - **Data Window:** Analysis based on signals collected up to 2026-09-28 ## Executive Snapshot **What it is:** Day & Night Map is a solar and lunar visualization tool for iOS and Android that displays the real-time day/night terminator line across the globe. **Why users hire it:** The app removes the cognitive friction of calculating global light cycles, which ham radio operators and photographers require for planning communication and lighting conditions. ## App DNA (Features & Intent) - **[Standard] Live Day/Night Map:** Real-time visualization of the terminator line across the globe with pinch-to-zoom and pan controls. - **[Differentiator] Time-Travel Controls:** Interactive date and time sliders allow users to view historical or future solar positions. - **[Differentiator] Animated GIF Export:** Generates shareable animated GIFs showing the movement of the day/night line over a custom time range. * *User Intent:* Users seek social connection and competitive engagement with peers. ## Market Position {#market-position} Day & Night Map maintains a 4.74 average rating across 3,960 total reviews, signaling strong product-market fit within its niche. The lack of recent major feature updates, however, risks ceding ground to more active competitors in the astronomical utility space. ## Monetization Strategy - **Model:** Freemium - **Tiers:** Free version with ad support, Pro version (unlocks equator/tropic lines and landscape mode) - **Analysis:** The freemium model uses ad-supported access to drive volume, with a Pro upgrade path to remove ads and unlock geographic map overlays. ## 🟢 User Sentiment (Medium Confidence: 60 of 80 reviews analyzed) {#user-sentiment} - **Overall Rating:** 4.79/5 - **Platform Split:** iOS 4.7/5 (1.4K ratings) | Android 4.8/5 (2.6K ratings) - **Overall Sentiment:** Thrilled ### Top Praises - **Visualizing the day and night terminator line helps radio enthusiasts plan long-distance communication propagation** - **Clean interface design allows users to easily track solar and lunar positions without excessive advertising** - **Educational utility provides a clear perspective on global daylight cycles for students and casual observers** ### Top Complaints (Impact Areas) - **Occasional UI layout conflicts on specific devices prevent users from accessing the date adjustment controls** ## SWOT Analysis {#swot} **Core Strengths:** - Terminator line visualization enables precise gray-line propagation planning for ham radio operators **Growth Levers:** - Integrating city-specific data and local time zones would improve utility for international scheduling ## What's New - **Latest (v3.6.2, 2 weeks ago):** Addressed device-specific crashes and general usability improvements. ## App Momentum (Maintenance) {#momentum} - Ships maintenance-only updates. - Fixed device-specific crashes. > **Cadence:** 2 total versions · 0 majors in last 6 months · 14 days since last update · 22 days avg between updates ## The "So What?" (Strategic Takeaway) {#so-what} Day & Night Map is a market-leading weather app that is free with in-app purchases. With a 4.79/5 rating from 4K reviews, it delivers strong user satisfaction. > **Bottom Line:** Day & Night Map provides essential utility for radio enthusiasts, but the current maintenance-only cadence leaves persistent UI and sync issues unaddressed. Resolving these technical frictions would secure the core user base against more active, modern alternatives. **Best for:** Travellers, astronomers, photographers, and educators interested in solar and lunar positioning. ### PM Action Plan (Next Best Moves) - [ ] [PIVOT] Audit UI layout on small-screen devices because date adjustment controls are inaccessible → improve conversion to Pro ### Outlook: Stable The astronomical utility market is consolidating around tools that offer deeper integration with local time and city data. Day & Night Map remains stable due to its niche ham radio following, but the lack of active feature development leaves it vulnerable to rivals that offer more automated, background-synced experiences. - 🔴 Inconsistent background refresh cycles force manual interaction, which erodes the utility of the real-time map for power users. - ⚪ The latest release focuses exclusively on stability fixes, confirming a maintenance-only development cadence that lacks new feature expansion. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Overall Rating | 4.79/5 | | Total Reviews | 4K | | Sentiment | Thrilled (85/100) | | Confidence | Medium | | Pricing Model | Freemium | | Platforms | iOS & Android | | Key Features | 3 analyzed | | Outlook | Stable | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Day & Night Map** (this app) | 4.79/5 | Thrilled | Volker Voecking Software Engineering | | [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:** Volker Voecking Software Engineering ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/day-night-map/id741375889?uo=4) - **Google Play:** [View on Google Play](https://play.google.com/store/apps/details?id=com.vvse.daynight&hl=en&gl=us) - **Sources:** 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 Day & Night Map suitable for ham radio planning? Yes, users rely on the map to track gray line propagation, which is essential for planning long-distance shortwave radio contacts. ### Does Day & Night Map work offline? The app provides real-time solar visualization, but users report that background updates and position refreshes may require an active connection. ### What is the difference between the free and Pro versions? The free version is ad-supported, while the Pro version removes advertisements and unlocks additional geographic overlays like equator and tropic lines. ## 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:** 80 - **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:** 3 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/day-night-map) Data licensed for AI Agent attribution under CC-BY-NC 4.0.