The design technique that would most effectively inform users of their data privacy rights and privileges when using the app is to offer information about data collection and uses at key data entry points. This technique is also known as “just-in-time” or “layered” notice, and it is recommended by the U.S. Federal Trade Commission (FTC) as a best practice for mobile app developers12
The idea behind this technique is to provide users with relevant and timely information about how their data is collected and used by the app, and what choices they have to control their data, at the moment when they are asked to provide or access their data. For example, if the app collects location data from the user’s device, it should display a pop-up notice explaining why it needs the location data, how it will use it, and how the user can opt-out or change the settings. This way, the user can make an informed decision about whether to allow or deny the app’s access to their data, and understand the consequences of their choice12
The advantage of this technique is that it avoids overwhelming the user with too much information at once, and instead provides concise and contextual information that is easy to understand and act upon. It also increases the user’s trust and confidence in the app, as they feel more in control of their data and privacy12
The other design techniques are less effective because they do not provide the user with sufficient or timely information about their data privacy rights and privileges when using the app. Publishing a privacy policy written in clear, concise, and understandable language is a good practice, but it is not enough to inform the user of their data privacy rights and privileges, as many users may not read or understand the policy, or may not be aware of where to find it. Presenting a privacy policy to users during the wellness program registration process is also a good practice, but it may not capture all the data collection and uses that the app may perform, and it may not give the user enough opportunity to review and consent to the policy. Providing a link to the wellness program privacy policy at the bottom of each screen is also a good practice, but it may not be noticeable or accessible to the user, and it may not provide the user with the specific information they need at the point of data entry or access12
References:
Mobile Privacy Disclosures: Building Trust Through Transparency: A Federal Trade Commission Staff Report (February 2013)
IAPP CIPP/US Certified Information Privacy Professional Study Guide, Chapter 6: Privacy Program Management, Section 6.4: Privacy by Design
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