You can cancel anytime in your account, in a few taps, in settings on both the mobile and web app. If you subscribed through the App Store or Google Play, cancel in your Apple or Google subscription settings.
Monthly plans: future payments stop, you keep access until the end of the period you have paid for, and there is no refund for that period. Yearly plans are a 12-month commitment: cancelling stops the next renewal, and you keep access until the end of the 12 months you have paid for. Terms of use
This does not affect your legal rights if something goes wrong with the service.