Sensor Logger is a free, easy to use, beautifully designed data logger that logs readings from motion-related, GPS, and audio sensors on your phone. An intuitive interface allows you to select your desired sensors and sampling frequency. A simple tap of a button initiates the recording function, which works even when the app is in the background. You can view and manage all recordings within the app via interactive plots. The export functionality conveniently zips and output recordings in a simple CSV or JSON format. For advanced use cases, you may also stream data via HTTP during a recording session.

Main Features:
- One-Tap Logging
- Background Recording
- View Recordings on Interactive Plots
- Stream Data via HTTP
- Zipped CSV & JSON Exports
- Enable & Disable Specific Sensors
- Add Timestamp Synchronised Annotations During Recording
- Adjust Sampling Frequency for Sensor Groups
- Raw and Calibrated Measurements Available
- Live Plots for Sensors
- Bulk Export & Delete Recordings
- Completely Free & Ad Free
- Data Stays On-Device and 100% Private

Supported Measurements (if available):
- Device Acceleration (Accelerometer; Raw & Calibrated)
- Gravity Vector (Accelerometer)
- Device Rotation Rate (Gyroscope)
- Device Orientation (Gyroscope; Raw & Calibrated)
- Magnetic Heading (Magnetometer; Raw & Calibrated)
- Barometric Altitude (Barometer)
- GPS Coordinate, Altitude, Speed & Heading
- Audio (Microphone)
- Loudness (Microphone)
- Light Sensor
- Annotations (Timestamp and optional accompanying text comment)