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Stanford University researchers are studying how teenagers use smartphones. You can join other teens participating in a national study to understand smartphone use and its impact on health and society.

Limited spaces are available for teens (13-17 years old) to participate, if you are an Android phone user and live in the United States.

Participation involves:

• Attend a Zoom enrollment meeting with a researcher and your parent/guardian
• Install our app on your phone
• Keep the app running and contributing data for 6 months
• Complete brief surveys every week
• Complete 3 sets of ASA24 nutrition surveys

You will receive up to $250 in e-gift cards for your time and effort. If you withdraw from the study for any reason, we may offer partial compensation based on your participation.

Once installed and activated, our app will automatically record how you use your smartphone and send the data to secure servers approved by Stanford to protect your privacy. All your data will be kept confidential and will only be used for research purposes. It will not be sold or shared for commercial purposes.