Deleting the app will not stop subscriptions. You must unsubscribe through your app store.
Step 1: Click on the "Settings" button.
Step 2: Click on the Yellow "Manage" Button.
It is located on the right side of the screen.
This will take you outside of the app to your app store.
Once you log in to Apple or Google, you will see a list of every app with a subscription.
Click on the app you would like to subscribe from and follow the steps provided.