1. Kim Chen Faculty Mentors: Dr. Pamela Wisniewski and Dr. Damla Turgut
Leveraging the FitBit API to Share Activity Levels with a Trusted Caregiver
Hello, my name is Kim Chen. I am a rising junior studying Computer Science at Stetson University. And my project this summer is Leveraging the FitBit API to Share Activity Levels with a Trusted Caregiver.
Kim Chen
Faculty Mentors: Dr. Pamela Wisniewski and Dr. Damla Turgut

2. Create a caregiving mobile application: “Carebitter” User study
Project 9: Leveraging the Fitbit API to Share Activity Levels with a Trusted Caregiver REU Student: Kim Chen Faculty Mentor(s): Dr. Wisniewski and Dr. Turgut
Whether or not end users would be comfortable sharing health data in the context of a caregiving app
Goal:
Create a caregiving mobile application: “Carebitter”
User study
Approach:
In the context of wearable IoT technology, the goal of this project is to determine:
Whether or not end users would be comfortable sharing health data in the context of a caregiving app
To accomplish this, we will employ a user study. However, prior to conducting a user study, we first had to build an application for users to test, which is what I started on this summer.
Since this is the first year of a multi-year research project, my job was to start developing this mobile application.

3. OAuth 2.0 Implicit Grant Flow
Project 9: Leveraging the Fitbit API to Share Activity Levels with a Trusted Caregiver REU Student: Kim Chen Faculty Mentor(s): Dr. Wisniewski and Dr. Turgut
Technical Approach
Making API Requests
Access Token
Callback URL
OAuth 2.0 Implicit Grant Flow
Fitbit API
Our application uses the Fitbit API and OAuth 2.0 Implicit Grant Flow for user authorization. After the user is authorized they are redirected back to the application’s callback with an access token which is stored client-side. And then we proceed to make API request with the token.

4. Project 9: Leveraging the Fitbit API to Share Activity Levels with a Trusted Caregiver REU Student: Kim Chen Faculty Mentor(s): Dr. Wisniewski and Dr. Turgut
Interface Design
Title Screen displaying application logo and slogan
Explains to the Fitbit user what the application does, and how they can revoke access whenever they feel necessary
Chrome tab for Fitbit login and authorization
Screen that allows the Fitbit user to select the type of information they want to share
Dashboard which displays the information and shows when it was last updated
The end product of my work is a functional mobile app where a Fitbit user can login to their account on another users’ phone.
The interface design consists of
A title screen and information screen which explains to the Fitbit user what the application does
They then login to Fitbit
And after the user selects the type of info they want to share
Then, on the dashboard, the other user who would be designated as a caregiver would be able to see important information about the last activity of the caregivee, such as heart rate and steps last logged
Title Screen displaying application logo and slogan
Explains to the Fitbit user what the application does, and how they can revoke access whenever they feel necessary
Chrome tab for Fitbit login and authorization
Screen that allows the Fitbit user to select the type of information they want to share
Dashboard which displays the information and shows when it was last updated

5. Project 9: Leveraging the Fitbit API to Share Activity Levels with a Trusted Caregiver REU Student: Kim Chen Faculty Mentor(s): Dr. Wisniewski and Dr. Turgut
Alerts and notifications within the application for when either heart rate or steps fall outside of a certain threshold
Future Work
Provide a better understanding of the benefits and privacy implications of peer-to-peer sharing of personal health information using IoT devices in the context of caregiving
Significance
I made considerable progress on this project, though we hope to implement alerts and notifications prior to conducting the user study.
Finally, the significance which this work can provide is a better understanding of the benefits and privacy implications of peer-to-peer sharing of personal health information using IoT devices in the context of caregiving