If you are aged 5-15, then a parent, guardian, or carer must apply on your behalf. As the app cannot store personal data, there is no way to verify who the person making the application is, who the child is, and know that the person making the application is authorised to act on behalf of that child.
Find out more about other ways to apply.
The app is updated regularly, so free bus travel is available to collect as soon as you turn 16.