You can use the free / premium themes as long as you wish to. However, your subscription for free updates lasts only for a year after the purchase. You need to renew your subscription if you wish to get the updates after the subscription ends. The renewal of the subscription will provide you with updates for another year. We however provide support even if your subscription has ended. To know more, you can read the terms and conditions(https://evisionthemes.com/terms-and-conditions/ ).