AstronomyAtlas | Sky Map and Satellite Tracker - Flutter App Template

AstronomyAtlas is the ultimate, premium, high-performance offline mobile planetarium application template built for space enthusiasts, stargazing hobbyists, and amateur astronomers. Engineered with Flutter’s cross-platform capabilities, AstronomyAtlas delivers a native-speed user experience on both Android and iOS from a single, clean codebase. Structured with clean Domain-Driven MVVM architecture and Riverpod state management, this app provides a complete offline-first solution for tracking stars, constellations, solar system planet orbits, and satellite passes. Optimize your mobile app store presence in the highly active science, reference, and education niches today!AstronomyAtlas  Successful stargazing requires accurate calculations. AstronomyAtlas empowers hobbyists with a real-time 3D Night Sky Map that maps alt-azimuth grids and constellation connections using gyroscopic sensors. Users can search and find celestial bodies through an offline Deep Sky Catalog powered by SQLite (containing Messier seed items and the NGC catalog) and preview high-resolution sky photography over coordinate grids via the DSS2 observatory photo inspector.Beyond simple sky maps, the application features a built-in Solar System Orbit Simulator. This simulator propagates orbits using Keplerian planetary elements and displays real-time velocity vectors. To track overhead objects, the app includes an offline Satellite & ISS Pass Tracker, which calculates trajectories using SGP4/SDP4 propagation. Users can schedule automated, offline notifications for visible overhead passes with a single click.For app publishers and developers, AstronomyAtlas is completely monetization-ready and store-optimized. It is pre-configured with secure compile-time Google AdMob ads (supporting App Open, Native, Banner, and Interstitial formats) and a seamless in-App Purchase (IAP) store flow for lifetime premium upgrades. Designed using a fast local SQLite database and Hive settings storage, this template guarantees a low-maintenance, serverless business model with zero database hosting overhead. Launch your mobile app business in the highly active astronomy and education niche today with AstronomyAtlas!Disclaimer: Users are responsible for creating and managing their own Google AdMob accounts. Ad revenue and account standing are strictly subject to Google’s specific terms, conditions, and policies.Top Highlighted Features️ Real-Time Offline Satellite Tracking: Propagates satellite orbits completely offline using SGP4/SDP4 mathematical algorithms, scheduling local system pass reminders without server overhead.Gyroscopic 3D Sky Mapping: Connects real-time gyroscopic and accelerometer sensors to align star positions, constellations, and alt-az coordinate grids with the user’s viewport.Keplerian Orbit Simulator: Simulates vector orbital paths of major solar system planets with time-scrubbing scenarios and velocity vector calculations.Observatory DSS2 Image Overlays: Integrates high-resolution observatory photographic lookups for Messier and NGC catalog objects over sky coordinates.Dual Monetization Channels: Pre-configured with Google AdMob banners/native/interstitials and a clean Store checkout flow to purchase the Lifetime Astronomer Pass.Core Technical Stack & ArchitectureFlutter Stable Channel: Developed using Flutter 3.x with Dart, ensuring native-speed performance and smooth animations across Android and iOS from a single codebase.Clean MVVM Architecture: Highly modular folder structure with separated feature modules (sky map, satellites, solar system orbit simulator, deep sky, onboarding, settings), making customization and extensions straightforward.Sqflite & Hive Databases: Relies on SQLite (Sqflite) and Hive for ultra-fast, robust, offline data persistence. Includes built-in support for safe database migrations to preserve user data during updates.Riverpod State Management: Decoupled, predictable, and testable dependency injection and reactive state updates across all features.SGP4/SDP4 Orbit Propagation: Simplified General Perturbations mathematical model to compute satellite coordinate trajectories dynamically.App Features for Users3D Night Sky Map: Real-time stereographic viewport mapping stars and constellations with gyroscopic device sensors. Includes a night vision mode toggle to preserve dark adapted eyes.Keplerian Orbit Simulator: Interactive, top-down Keplerian orbital vector simulation. Features a date-scrubbing progress control to fast-forward orbits.Satellite & ISS Pass Tracker: Computes exact overhead trajectories and zenith elevation angles. Supports one-click offline notifications before visible passes start.Deep Sky catalog Search: Search through Messier and NGC objects offline. Allows viewing coordinates and loading high-res DSS2 sky overlay pictures.Monetization & Store ReadyAdMob Integration: Pre-configured with Google AdMob Banner, Interstitial, Native, and App Open ads. Features a lifetime ad-free premium unlock option.in-App Purchase Store: Integrated with the official in_app_purchase plugin supporting Play Billing and StoreKit, allowing users to purchase the Lifetime Astronomer Pass.Privacy & Security compliance: Fully structured GDPR UMP Consent Form flow with EEA region debug overrides for local sandbox testing. Android auto-backup rules are configured to prevent premium bypasses.Prerequisites & EnvironmentFlutter SDK: Version 3.27.x or later (Stable).Android Target: SDK 36 (Android 16), Min SDK 23.iOS Target: Deployment Target iOS 14.0 or later.IDE: Android Studio or Visual Studio Code.