When your one month trial runs out and you choose to subscribe press the gear button in the top left corner of your screen. This will take you to the information page. There you can choose to purchase a 6 month or 12 month subscription. It is very important that you subscribe with the same account that you used during your trial. Do not set up a second account, this will not work.
If you choose not to subscribe at the end of your trial follow these delete instructions.
If you choose not to subscribe at the end of your trial follow these delete instructions. On your child's device go to Settings > General > Device Management (or Profiles) and delete the ParentKit material there. (At this point it may ask for a passcode, if it does it's asking for the device's passcode, the one you enter on the lock screen) This will remove the profile and lift all restrictions. If you're considering future use, please delete the profiles from within the app as well. The two are linked, so you if you delete the one on the child's device you'll need to delete the one in the app as well. Do this by swiping to the left over them, inside the app. If you change your mind in the future and want to subscribe please use the same account.