Woo hoo! You like focus booster and you want to subscribe
During a 15 day free trial upgrading to a subscription is simple.
In HQ click on the orange person in the right hand corner and select 'manage my subscription'. You will be greeted with information about your free trial, including the date that it finishes and a green 'subscribe now' button. Just click that, select a $2.99 monthly plan or $29.99 annual plan and fill out your credit card details.