Sensor Logger

Sensor Logger collects, records and displays data from a wide range of sensors on your phone — including accelerometer, gyroscope, GPS, audio, camera and bluetooth devices. You can also log device properties such as screen brightness, battery level and network state. An intuitive interface allows you to select your desired sensors and preview them live. A tap of a button initiates the recording function, which works even when the app is in the background. You can view and manage recordings within the app via interactive plots. The export functionality conveniently outputs your recordings in a variety of formats, including Zipped CSV, JSON, Excel, KML and SQLite. For advanced use cases, you may also stream data via HTTP or MQTT during a recording session, resample and aggregate measurements from multiple sensors, and create Studies to collect recordings from other Sensor Logger users with ease. Sensor Logger is specifically designed for researchers, educators, and anyone with an interest in collecting or monitoring sensor data on their smartphone. It serves as a toolbox for exploring various fields, including physics, science, technology, engineering, and mathematics (STEM).

Main Features:
- Comprehensive Sensor Support
- One-Tap Logging
- Background Recording
- View Recordings on Interactive Plots
- Stream Data Real-time via HTTP / MQTT
- Zipped CSV, JSON, Excel, KML and SQLite exports
- Resample and Aggregate Measurements
- Enable & Disable Specific Sensors
- Supports Logging Nearby Bluetooth Devices
- Add Timestamp Synchronised Annotations During Recording
- Adjust Sampling Frequency for Sensor Groups
- Raw and Calibrated Measurements Available
- Live Plots and Readings for Sensors
- Organise, Sort and Filter Recordings
- Bulk Export & Delete Recordings
- Free Resources to Help You Analyse Your Data
- Ad-Free
- Data Stays On-Device and 100% Private

Supported Measurements (if available):
- Device Acceleration (Accelerometer; Raw & Calibrated), G-Force
- Gravity Vector (Accelerometer)
- Device Rotation Rate (Gyroscope)
- Device Orientation (Gyroscope; Raw & Calibrated)
- Magnetic Field (Magnetometer; Raw & Calibrated)
- Compass
- Barometric Altitude (Barometer) / Atmospheric Pressure
- GPS: Altitude, Speed, Heading, Latitude, Longitude
- Audio (Microphone)
- Loudness (Microphone) / Sound Meter
- Camera Images (Front & Back, Foreground)
- Camera Video (Front & Back, Foreground)
- Pedometer
- Light Sensor
- Annotations (Timestamp and optional accompanying text comment)
- Device battery level and state
- Device screen brightness level
- Nearby Bluetooth devices (All advertised data)
- Network

Optional Paid Features (Plus & Pro):
- No limitations on the number of stored recordings
- Additional export formats — Excel, KML and SQLite
- Combined CSV export — combine, resample and aggregate measurements from multiple sensors
- Customise recording workflow
- Advanced sensor configurations
- Custom naming templates
- Theme and icon customisations
- Create larger Studies with more participants
- More allocated storage for Studies using Sensor Logger Cloud
- Unlimited number of simultaneously toggled Bluetooth sensors and no limit on the minimum signal strength
- Email support (Pro & Ultimate only)
- Advanced Study customisation, including creating custom accompanying questionnaires and custom Study ID (Ultimate only)

Recent changes:
- Connect to MQTT Brokers using TCP (in addition to Websockets)
- Subscribe to an MQTT Topic and log messages as a part of the recording
- Add additional metadata to Camera sensor