Offline GPS Compass Altimeter

Keep direction, coordinates, altitude, and saved waypoints available even when mobile data is not. Offline GPS Compass Altimeter turns your phone's supported sensors into a clear outdoor instrument with visible accuracy and source information.

The compass and GPS tools work without an internet connection. No account is required.

READ A CLEAR COMPASS
• View magnetic or true north
• See heading, calibration quality, and sensor status
• Point toward a saved waypoint
• Get calibration guidance when interference is detected

CHECK COORDINATES AND GPS ACCURACY
• View latitude and longitude in decimal format
• See the latest fix and its accuracy radius
• Copy or share coordinates through the Android share sheet
• Save important locations locally

VIEW ALTITUDE WITH CONTEXT
• See GNSS altitude and vertical accuracy when available
• See barometer availability on supported phones
• Keep source information next to the altitude value
• Understand when a weak sky view can affect the result

SAVE WAYPOINTS OFFLINE
Mark a campsite, parked car, meeting point, trail junction, or observation location. Saved coordinates stay on the device by default and do not require an online map.

BUILT AROUND SENSOR HONESTY
Not every phone includes an orientation sensor or barometer. The capability card tells you what is available and adapts the experience instead of inventing data. GPS altitude can fluctuate, especially with a weak sky view, so the app displays accuracy whenever Android provides it.

SAFETY NOTICE
This app is a general-purpose reference tool, not a certified navigation, aviation, marine, surveying, or emergency instrument. Carry appropriate maps, power, and safety equipment for remote travel. Do not rely on one phone or one sensor for a safety-critical decision.

Save a point, follow the bearing, and stay oriented without an account or a data connection.