In order to access the subscription settings, go to the home page then click on the image icon on the upper-right side of the screen, next to the notification bell. Then click on “Profile” and then hit Subscriptions.
In order to modify, view or cancel an existing plan, click on the View Detail button on the right end side of the screen.
Depending on the subscription plan, you have a green (“Upgrade Subscription”) button and a red (“Cancel subscription”) button. At any given time you can upgrade or cancel your subscription.