Meridian — Outdoor & GPS Tools

🧭 1. HIGH-PRECISION COMPASS (Aviation & Marine)
* Magnetic North & True North modes with automatic GPS magnetic declination calculation.
* Aviation & Marine dial with real-time declination indicator.
* Magnetic field strength in microteslas (µT) with automatic interference detection.
* GPS altitude and exact coordinates readout.

📐 2. BUBBLE LEVEL & CLINOMETER
* Multidirectional bubble level for flat surfaces and edge alignment.
* Precision clinometer measuring slope angles and pitch/roll tilt on X & Y axes.
* High-contrast outdoor mode and auditory leveling signal.

🥾 3. GPS HIKING & TRAIL TRACKER
* Background GPS track recording with battery-optimized background service.
* Interactive map view with live trackline, custom Waypoints, and "Return to Start" navigation.
* Comprehensive stats: Distance, duration, current & average speed, elevation gain D+, max elevation.
* Instant GPX export and sharing.

🌌 4. AR SKY MAP & ASTRONOMY VIEWER
* Augmented Reality (AR) constellation, star, and planet viewer (Mercury, Venus, Mars, Jupiter, Saturn).
* 24-hour time scrubbing: Advance time to preview celestial positions throughout the night.
* Black Background Mode (Daytime view): Clear star and planet visibility during daytime without camera glare.
* Detailed astronomical object cards (magnitude, RA/Dec, distance in light-years, spectral type, mythology).

🧰 5. TOOLBOX & SURVIVAL KITS
* Chronometer with lap times, vertical speed calculation (ascent/descent), and GPS location tagging.
* Customizable survival kit inventory organized by category.
* Official 72-hour emergency kit based on civil defense guidelines with item expiry date tracking.
* Outdoor survival guides: Comprehensive tips for forest and jungle environments.

---

✨ WHY CHOOSE MERIDIAN?
* 🚫 Ad-free & Privacy-first: Zero tracking or personal data collection.
* 🛰️ 100% Offline Capable: All algorithms, catalogs, and tools operate without internet.
* 🎨 Multiple Luminous Themes: Day, Night, Military, and High-Visibility themes.