CrowdSense is a free continuous sensing tool, based on our open source library SensingKit. It provides an easy way for researchers to capture sensor data using iOS devices. Taking user privacy seriously, all data are fully anonymised and the user’s explicit permission is required prior to enabling the sensors. Recorded data can be either shared withing the app, or accessed using iTunes through File Sharing.

CrowdSense supports the following sensors:
- Accelerometer
- Gyroscope
- Magnetometer
- Device Motion (Gravity, User acceleration, Magnetic Field, Rotation, Attitude)
- Motion Activity
- Pedometer
- Altimeter
- Location
- Heading
- iBeacon™ Proximity
- Eddystone™ Proximity
- Battery
- Microphone

For more details about SensingKit library, please refer to, or read the following publications:

Kleomenis Katevas, Hamed Haddadi and Laurissa Tokarchuk, "SensingKit: Evaluating the Sensor Power Consumption in iOS devices", 12th International Conference on Intelligent Environments (IE'16), September 2016, London, UK.

Kleomenis Katevas, Hamed Haddadi, Laurissa Tokarchuk, "SensingKit – A Multi-Platform Mobile Sensing Framework for Large‑Scale Experiments", Extended abstract, ACM MobiCom 2014, Maui, Hawaii, September 2014.

This application is part of a Ph.D. research, conducted in Queen Mary University of London. For more information, please visit

What’s New

Version 1.3.4

- Fix bug with incorrect timestamps when collecting data from motion and orientation sensors.
- Update for the new iOS 12.

This update uses SensingKit-iOS framework v0.5.1.
For any comments, feel free to contact us at

Ratings and Reviews

5.0 out of 5
3 Ratings

3 Ratings

App Privacy

The developer, Kleomenis Katevas, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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