Earphones Sensor vs GEO Calc

Turn your AirPods into a motion sensor that records the movement of your head. Just put on your compatible AirPods and tap a button — the built-in sensors capture your motion and show it on a real-time graph. Recorded data can be saved as a CSV file, ready for research, experiments and data analysis. Data you can measure: • Acceleration • Gravity direction • Rotation rate (gyroscope) • Attitude (pitch / roll / yaw) Highlights: • Easy measurement — just wear your compatible AirPods • Visualize your motion on a real-time graph • Turn each data type on/off in settings • Save as CSV and access it from the Files app • The screen stays on while measuring Perfect for posture research, exercise and rehabilitation analysis, motion data logging and much more. * Requires AirPods with built-in motion sensors.

GEO Calc : Coordinates is a WGS84 field calculator for surveyors, engineers, and outdoor professionals. Convert coordinates, compute geodesic distance and bearing, measure on a map, and manage waypoints—on iPhone and iPad. COORDINATE CONVERTER Convert Decimal Degrees, DDM, DMS, UTM, MGRS, USNG, and Plus Codes. Auto-detect format. Copy results in one tap. DISTANCE & BEARING Vincenty geodesic distance and forward azimuth on the WGS84 ellipsoid—not flat-map shortcuts. Direct geodesic calculator (Pro). MAP & MEASURE OpenStreetMap tiles with path and polygon measure on the ellipsoid. Optional satellite layer (Pro). Go-to coordinate. Live GPS (Pro). FIELD NAVIGATOR (PRO) Walk to a coordinate with a live compass arrow and arrival alert. WAYPOINTS & GPX Save waypoints on your device. Export GPX 1.1. Import GPX waypoints (Pro). Free tier: up to 20 waypoints. UNITS & LANGUAGES Metric, imperial, or nautical. Twelve languages. Dark theme for outdoor readability. IN-APP PURCHASES Free to download with ads. GEO Calc Pro is a one-time, non-consumable in-app purchase—no subscription. Pro unlocks direct geodesic calculator, live GPS, field navigator, satellite map layer, GPX import, and unlimited waypoints. Restore purchases anytime from Settings or the Pro screen. INTERNET & LOCATION Map tiles load over the internet from OpenStreetMap. Live GPS and field navigation use device location when you allow it. Not for certified legal surveying. Verify critical measurements with professional methods.