At the home screen, go to “Settings”
Click on “iTunes & Apple Store”
Click on the Apple ID option
Click on “View Apple ID” (you might have to sign in)
In “Subscriptions”, click on “Manage”
Choose the subscription you wish to manage.
If there isn’t an Apple subscription, but you’re being charged, check if you’re using the right Apple ID.
Use the options to manage your subscription and cancel your subscription.
More information: https://support.apple.com/en-us/HT202039
At the menu on the left side on the screen, select “Subscriptions”
Search for the active BTFIT subscription and click on “Manage”
At the “Subscription Status” item, click on “Manage Subscription”
At the “Subscription” item, click on “Cancel Subscription
Access the Play Store at your smartphone.
At the menu on the left side of the screen, select “My apps”
Select the “Subscriptions” tab
Select the BTFIT app
Click on “Manage Subscriptions”
On this screen you’ll have the “Cancel Option”