Once you've purchased The Dyrt PRO directly, or following the conclusion of your free trial period, it is yours to use for a full year. If you wish to no longer subscribe to The Dyrt PRO in the future, please turn off your subscription auto renew.
If you purchased The Dyrt PRO through the The Dyrt website, you can turn off your subscription auto renew from your profile page on TheDyrt.com. If you purchased The Dyrt PRO through The Dyrt mobile app, please go to the "Me" tab in The Dyrt app user settings, which will link you to the correct app store to update your settings.
Those instructions can also be found here:
iPhone subscription instructions:
Android subscription instructions:
Unfortunately, The Dyrt can’t issue a refund for any payments made after your free trial of The Dyrt PRO ends, but you can reach out to Apple (https://support.apple.com/en-us/HT204084) or Google Play (https://play.google.com/store/account) to request a refund.
If you choose to cancel your PRO subscription, you can certainly still use The Dyrt for free to access information about tens of thousands of campgrounds across the US.