MotionRecord

MotionRecord transforms your Android smartphone into a precise measuring instrument. The app records sensor data at up to 100 Hz and saves it as analyzable JSON files—completely offline, without cloud storage, and without an account.



MotionRecord SENSORS
• Accelerometer (3-axis, in g)
• Gyroscope (3-axis, rad/s)
• Magnetometer (3-axis, µT)
• GPS (position, speed, altitude, accuracy)
• Barometer (air pressure, relative altitude)
• Rotation vector (quaternion, Euler angle)
• Gravity & linear acceleration

SIGNAL PROCESSING
• Real-time filtering: low-pass, high-pass, moving average
• Butterworth filter (IIR, 4th order)
• Jerk calculation (acceleration change)
• Frequency band separation (low/mid/high)
• Calibration (bias, drift, noise floor)

RECORDING PROFILES
• Walking/Running: 100 Hz IMU, 1 Hz GPS

Motorcycle: 100 Hz IMU, optimized filters
• Car: 50 Hz IMU, stronger Smoothing

FEATURES

• Background recording (Foreground Service)

• Chunk-based storage (no RAM overflow during long sessions)

• JSON export (iOS-compatible format)

• Real-time dashboard with sensor status and Hz display

• Library of all recordings

• Completely offline — no internet connection required

PRIVACY
All data stays on your device. No analytics, no advertising, no tracking. You decide when and with whom you share your data.