If your child is aged 16 or over, they can download and use the app.
Although those aged 16 and over can use the app in education settings, the main benefit is outside that, when they are socialising, using public transport, or in a public space.
If a 16 or 17 year old receives an alert through the app, they should notify a trusted adult. When they are in an education setting, this trusted adult should be a member of staff who will then follow official guidelines.
The age limit is aligned to wider NHS services which generally consider those aged 16 and above to have sufficient maturity and capacity to make decisions relating to health care.