Everyone can get access to a Hal+ subscription at no charge for 2 weeks.
To start your free trial, tap the More tab, then Profile, the top row will tell you your account status. You can tap this and you will be taken to a screen to choose a subscription option and confirm your selection in your app store.
You will be charged for the subscription you chose at the end of the trial if you do not cancel your subscription before that date. You can cancel your subscription at any time during your trial to avoid being charged.