From the State of Utah:

The app is free to download, and use of the app is strictly opt-in and voluntary. Users own their location data and can delete it at any time. Personal data shared with public health officials will be used solely to combat COVID-19. Location data will be automatically deleted every 30 days, and symptom data will be automatically de-identified after 30 days. Healthy Together complies with State requirements for data security and encryption. 

You can download Healthy Together in your app store, from coronavirus.utah.gov/healthy-together-app, or from healthytogetherutah.com.