Yes. After the one-week paid trial, your subscription automatically renews each week unless you cancel before renewal.
The weekly price varies by country and is shown on your in-app payment screen before you confirm. You can also check your purchase confirmation or subscription details for the renewal amount and date.
To stop the next payment, cancel through the service that billed you. For a discounted trial purchased through Apple, Apple advises cancelling at least 24 hours before the trial ends. Apple subscription guidance.