The answer to this question depends on where you first purchased your subscription. If you purchased on the Apple or GooglePlay appstores, please refer to this document.
If you purchased your subscription on the website, log into your account here and go to the settings page. Please note that, as a website subscriber, you will not be able to edit your billing information in the mobile apps. You can only do so in the settings section of your web profile.
If you are still struggling or need assistance, contact us.
