If the subject is based in the United States or Canada, their mobile carrier does apply standard messaging charges for messages they receive from the study. The messages will not incur any additional charge beyond standard messaging rates. If the subject is based outside the United States and Canada, their mobile carrier does not charge them to receive text messages.
Subjects that opt to use the smartphone app will receive 1 text message with instructions to download and activate the app. Depending on their plan, the subject’s mobile carrier may charge them to receive this welcome message. The smartphone app is freely available in the iTunes/Google play app stores for Android and iPhone devices. Push notifications received through the application are free. The application will use a small amount of data and data usage will be charged according to the subject’s standard data rates.