Not at this time.
This depends on how you signed up. Did you make an account on our website? If so, did you pick a subscription plan at that time? If yes, then you can log into your account and can cancel there. This is also the case if you are using an Android device.
Alternatively, if you are using an iPhone and did not subscribe online, then you would have subscribed from an In-App Purchase. If this is the case, you will need to go into Settings > Apple ID > Subscriptions. From here you can cancel your subscription.