About Sensor Logger
Sensor Logger collects, records and displays data from a wide range of sensors on your phone & Wear OS watches — including accelerometer, gyroscope, GPS, audio, camera and bluetooth devices. You can also log device...
Sensor Logger collects, records and displays data from a wide range of sensors on your phone & Wear OS watches — 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
- Recordings on Interactive Plots
- Stream Data Real-time via HTTP / MQTT
- Intelligent, Custom Rule Engine.
- Zipped CSV, JSON, Excel, KML and SQLite exports
- Resample and Aggregate Measurements
- Enable & Disable Specific Sensors
- Scan & Log Nearby Bluetooth Devices
- Add Timestamp Synchronised Annotations During Recording
- Adjust Sampling Frequency for Sensor Groups
- Custom Recording Workflow
- Raw and Calibrated Measurements Available
- Live Plots and Readings for Sensors
- Organise, Sort and Filter Recordings
- Control and Track Recording Sessions From Watch
- Log Measurements From Your Watch
- Bulk Export & Delete Recordings
- Free Resources to Help You Analyse Your Data
- Ad-Free
- Data Stays On-Device and 100% Private
- Create and Share Dashboard-style, Data-driven Stories using your recordings, hosted online.
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
- Motion Activity
- 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
- Heart Rate (Wear OS Watches)
- Wrist Motion (Wear OS Watches)
- Watch Location (Wear OS Watches)
- Watch Barometer (Wear OS Watches)
Optional Paid Features (Plus & Pro):
- No limitations on the number of stored recordings
- Additional export formats — Excel, KML and SQLite
- Additional timestamp formats
- Checkpoint for long recordings
- Combined CSV export — combine, resample and aggregate measurements from multiple sensors
- Customise recording workflow
- Advanced sensor configurations
- Custom naming templates
- Theme and icon customisations
- Unlimited number of rules
- Unlimited number of annotation presets
- Unlimited Bluetooth beacons and no limit on the minimum RSSI
- 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)
Previous Versions
Here you can find the changelog of Sensor Logger since it was posted on our website on 2023-04-01 14:30:07.
The latest version is and it was updated on 2026-06-17 21:11:08. See below the changes in each version.
Sensor Logger version
Updated At: 2026-06-06
Changes: - Explicit support for deep link for easier automation.
- Bluetooth support for Rule Engine, including a new “reported as” operator for event driven sensors.
- Improvements to the Rule Engine experience.
Sensor Logger version
Updated At: 2026-06-06
Changes: - Camera now supports a snapshot mode, allowing you to bypass the standard image processing pipeline for higher capture frame rate (aka burst mode).
- Camera now supports 15/30/60fps video recording (when supported by the device).
- Improved tilt compensation as part of Sensor Zoo.
- Improved user experience around Sandbox with built-in QR code scanner.
- Improved Study state recovery after a crash
Sensor Logger version
Updated At: 2026-05-07
Changes: - You can now configure Studies to automatically delete the local copy of the recording from participant’s device upon a successful upload.
- Improvements to editing geo-fences in the Rule Engine.
- Support for playing a tone in the Rule Engine.
- Support for Trigger Mode in the Rule Engine — either trigger every time the condition is met, or when the condition is met for the first time in a sequence.
Sensor Logger version
Updated At: 2026-03-30
Changes: - Introducing Audio Indicator. Play a chime when recording starts and stops, and optionally at regular intervals during a session. Choose from multiple tone styles.
- You can now easily select all recordings for bulk operations like tagging, exporting and deleting.
- Fixes an issue with incomplete BLE data when recording All Nearby Devices.
- Fixes an issue where audio recording does not work reliably in the background.
- Fixed an issue with editing Studies with Webhooks.
Sensor Logger version
Updated At: 2026-03-22
Changes: - Introducing Sensor Zoo, a collection of open-source, standardised sensor processing algorithms. This allows more throughout standardisation across platforms and hardware.
- AHRS algorithms for orientation, linear acceleration, gyroscope and gravity vector.
- Simple barometric altitude equations.
- Sensor Logger now supports Vietnamese, Turkish and Indonesian! Thanks to all the community contributors for reviewing!
Sensor Logger version
Updated At: 2026-03-14
Changes: - Improve reliability
Sensor Logger version
Updated At: 2026-03-02
Changes: - Bug fixes
Sensor Logger version
Updated At: 2026-03-02
Changes: - You can now edit most settings and configuration of a Study post-creation.
- Multi-select as a new Questionnaire type for Studies. Participants need to upgrade to this latest version in order to view those questions, if any.
- You can now stream images via MQTT or HTTP alongside all other sensor data.
- Additional screens now support localisation, along with other translation enhancements.
- Improved BLE reliability.
Sensor Logger version
Updated At: 2026-02-22
Changes: - Add additional Info instructions for Participants of a Study. Info will show up as a new tab in a Study, with full markdown support.
- Clear indication the exact moment an image is taken.
- Clear warning when there are still pending files to be transferred for Watch recordings.
- Improved clarity when Webhooks are not configured for a Study.
- Bug fixes.
Sensor Logger version
Updated At: 2026-01-13
Changes: - Introducing the new Activity sensor, which logs motion activity types such as walking, running, cycling, driving and stationary.
- Rule Engine support for the Activity sensor.
- Live sensor preview now supports more fields for orientation and barometer.
- Inline Preview now supports battery temperature.
