Compass is a complete pocket navigator for hiking, backpacking and the outdoors: true-north heading, barometric altimeter, sun and moon times, and an offline GPX route tracker with embedded map. Works without signal — reliable direction at a glance, wherever you are.

COMPASS AND HEADING
- Tilt-compensated true-north or magnetic-north readout
- Automatic magnetic declination based on your GPS location
- Bearing lock — mark a heading and the arrow stays on target while you walk
- Live latitude and longitude — copy or share with one tap

ALTIMETER AND ALTITUDE
- Real-time altitude from the barometric sensor
- Automatic GPS calibration when you are stationary
- Manual calibration to a known elevation (trail-head sign, summit marker)
- Sparkline graph of altitude over time
- Air-pressure readout in hPa

SUN AND MOON
- Sunrise, sunset, moonrise and moonset for your current location
- Plan the golden hour, an evening hike, or a night out under the stars

ROUTE TRACKING AND OFFLINE MAP
- Track hikes, runs and sailing trips in the background
- Distance travelled, elevation gain and loss, duration
- Survives app restarts — never lose a route
- Embedded OpenStreetMap with tile caching for offline use
- GPX export — open your track in any compatible mapping or fitness app

UNITS AND DESIGN
- Switch between metric (m, km) and imperial (ft, mi) any time
- Dark Material 3 interface, edge-to-edge layout
- Available in 32 languages

TYPICAL USES
Hiking and trail running. Backpacking and survival training. Camping. Fishing and hunting. Geocaching and orienteering. Sailing and small-boat navigation. Photography and golden-hour planning. Stargazing. Land surveying. Drone flying. Scouting and outdoor education.

PERMISSIONS
- Location — for GPS coordinates, altitude calibration, sun and moon times, and route tracking
- Notifications — only used to keep the route session running in the background

PRIVACY
No account. No sign-up. No subscription. No in-app purchases. A small banner is served via AdMob — see the Data Safety section for AdMob's third-party disclosures. Made in Switzerland by an independent developer.

Get in touch: nils.roethlisberger@gmx.ch

Compass & Altimeter: Hike, GPS