The goal of this clinical trial is to test whether an app-based intervention can reduce the likelihood of a torticollis diagnosis in infants. The main question[s] it aims to answer are:

• whether an app can successfully deliver an intervention to parents of young infants
• whether parents who learn about torticollis will increase behaviors intended to prevent torticollis compared to parents who learn about general infant development

Participants will complete a monthly survey for 6 months asking about their parenting behaviors. Researchers will compare parents who receive notifications about torticollis with parents who receive notifications about general infant development to see if increased knowledge of torticollis leads to preventive behavior.

Inclusion Criteria:

• any parent with an infant under a month old who can answer a survey in English

Exclusion Criteria:

• infant already has a diagnosis of torticollis or plagiocephaly

Individual participant data that underlie results reported in published articles, after deidentification, as well as the study protocol, statistical analysis plan, and informed consent form, will be available beginning 9 months and ending 5 years following publication.

Only investigators whose proposed use of the data has been approved by a learned intermediary shall have access to conduct analyses as approved in the proposal.