# CrowdSense — Mobile Sensing Tool

> Mobile sensing tool for researchers to collect and export sensor data from iOS devices. (iPhone/iPad app by Kleomenis Katevas.)

- Source: https://appshunter.io/ios/app/crowdsense/id930853606 (this page in markdown: same URL + `.md`)
- Developer: [Kleomenis Katevas](https://appshunter.io/developer/526742174)
- Category: Utilities, Education
- Price: Free
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 12.0 · 2 MB
- Languages: American English
- Released: 2015-08-29
- Data updated: 2026-06-25
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/crowdsense/id930853606/reviews.md

## What is CrowdSense?

CrowdSense is a free continuous sensing app that enables researchers to collect rich mobile sensor data using iOS devices. Built on the open-source SensingKit framework, the app makes it easy to run mobile sensing studies and capture high-quality sensor streams for research and experimentation. CrowdSense prioritizes transparency and user control by requiring explicit permission before any sensor is activated, ensuring that all data collection is clear, secure, and fully under the user’s consent.

The app supports a wide range of device sensors, allowing researchers to capture diverse signals for behavioral, environmental, and mobility studies. Supported sensors include accelerometer, gyroscope, magnetometer, device motion (gravity, user acceleration, magnetic field, rotation, and attitude), motion activity, pedometer, altimeter, location, heading, iBeacon proximity, Eddystone proximity, battery status, microphone, screen brightness, and network connection.

Data recorded with CrowdSense can be easily accessed and exported for analysis. Researchers can share collected data directly from within the app or export it securely via USB using iTunes File Sharing, providing flexible workflows for integrating sensor datasets into research pipelines.

CrowdSense was developed as part of a PhD research project at Queen Mary University of London and is designed to support large-scale mobile sensing experiments using the SensingKit framework. More information about SensingKit is available at https://www.sensingkit.org, and additional details about the research behind the project can be found at https://minoskt.github.io.

Relevant publications include: “Finding Dory in the Crowd: Detecting Social Interactions using Multi-Modal Mobile Sensing” (SenSys-ML 2019), “Detecting Group Formations using iBeacon Technology” (HASCA 2016), “SensingKit: Evaluating the Sensor Power Consumption in iOS Devices” (IE 2016), “Walking in Sync: Two is Company, Three’s a Crowd” (WPA 2015), and “Poster: SensingKit — A Multi-Platform Mobile Sensing Framework for Large-Scale Experiments” (MobiCom 2014).

## Key features

- Continuous sensing with rich mobile sensor data
- User control and explicit sensor permission
- Support for a wide range of device sensors
- Easy data access and export
- Secure data sharing and USB export
- Built on open-source SensingKit framework


## Frequently asked questions about CrowdSense

### What is CrowdSense used for?

CrowdSense is a free continuous sensing app designed for researchers to collect rich mobile sensor data using iOS devices. It facilitates mobile sensing studies and captures high-quality sensor streams for research and experimentation.

### Does CrowdSense collect data without my permission?

No, CrowdSense prioritizes transparency and user control. It requires explicit permission before any sensor is activated, ensuring all data collection is clear, secure, and under your consent.

### What types of sensors does CrowdSense support?

CrowdSense supports a wide range of sensors including accelerometer, gyroscope, magnetometer, device motion, pedometer, altimeter, location, iBeacon proximity, battery status, microphone, and more.

### How can I access the data collected by CrowdSense?

Data recorded with CrowdSense can be easily accessed and exported. You can share collected data directly from within the app or export it securely via USB using iTunes File Sharing.

### Is CrowdSense available on Android devices?

Based on the provided information, CrowdSense is designed for iOS devices, including iPhone, iPad, and iPod. There is no mention of Android support.

### What is the update frequency for CrowdSense?

The latest version of CrowdSense is 1.4.0, last updated on March 14, 2026. This indicates a history of updates, though specific frequency is not detailed.

### What is the age rating for CrowdSense?

CrowdSense has an age rating of 4+, making it suitable for a wide range of users, including younger individuals who may be involved in research studies.

### Does CrowdSense have ads?

No, CrowdSense does not contain advertisements. The app is free to use and does not display any ads to users.

## Version history (last 5 releases)

### 1.4.0 — 2026-03-14

- Adds support for new sensors: Network Connection (data consumption, connectivity status, etc), Screen Brightness
- Renames Battery sensor to Battery Status and includes support for tracking Low Power Mode.
- Adds supports for Dark Mode
- Supports the latest iPhone and iPad devices
- Fixes compatibility issues with latest OS versions
- Updated SensingKit-iOS framework v0.6.0

### 1.3.4 — 2018-09-21

- 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 k.katevas@imperial.ac.uk

### 1.3.3 — 2017-11-27

- Support for the new iPhone X.
- Support for an upcoming Speed Networking experiment happening at QMUL.
- Performance improvements and bug fixes.

This update uses SensingKit-iOS framework v0.5.1b.
For any comments, feel free to contact us at k.katevas@qmul.ac.uk.

### 1.3.2 — 2017-06-20

- Support for our CrowdSense Demo at ACM MobiSys 2017 conference. Join us at Niagara Falls, NY on June 19th - 23rd.
- Performance improvements and bug fixes.

This update uses SensingKit-iOS framework v0.5.1b.
For any comments, feel free to contact us at k.katevas@qmul.ac.uk.

### 1.3.1 — 2017-06-15

- Support for our CrowdSense Demo at ACM MobiSys 2017 conference. Join us at Niagara Falls, NY on June 19th - 23rd.
- Performance improvements and bug fixes.

This update uses SensingKit-iOS framework v0.5.1b.
For any comments, feel free to contact us at k.katevas@qmul.ac.uk.

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## Related topics

[kleomenis katevas](https://appshunter.io/ios/topics/kleomenis-katevas)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-25.*