Subscriptions may be canceled at any time. By canceling, you lose access to the app on the day of the next scheduled payment in addition to ceasing the shipment of discs.
Alternatives to canceling so that you do not lose access to your NuCalm app are lowering your subscription level to lessen the supply of discs you receive. You can change your subscription level here:https://nucalm.com/my-account/subscriptions/