Reducing unintentional injuries in under fives: Development and testing of a mobile phone app.

Background: Unintentional injuries are a leading cause of preventable death and a major cause of ill health and disability in children under 5 years of age. A health promotion mobile phone application, "Grow up Safely" (GUS), was developed to support parents and carers in reducing unintentional injuries in this population of children.

Methods: A prototype of the mobile application was developed to deliver health education on unintentional injury prevention linked to stages of child development.