Apple Fitness+ is billed through your Apple Account, so it is cancelled from iPhone Settings rather than on Apple Fitness+'s own website. It takes about thirty seconds.
Updated
If you do not see Apple Fitness+ on that screen, it is being billed somewhere else — check whether a family member manages it through Family Sharing, or whether it came bundled with something else.
Worth knowing: Billed by Apple only. Included in the Apple One Premier tier, in which case it cannot be cancelled separately.
Workout videos stop being available at period end. Completed workout history stays in the Fitness and Health apps.
Always confirm it worked. Look for a cancellation email, and re-open the billing page to check the status reads cancelled or "ends on [date]". Then set a calendar reminder for the day after the period ends and check your card statement. A surprising number of cancellations do not take on the first attempt.
Most services have a cheaper tier that people never look at, and several offer a pause instead of a cancellation. If you use Apple Fitness+ occasionally rather than never, a lower plan or a temporary pause usually beats cancelling and resubscribing at a higher price later.
Recurra reminds you before Apple Fitness+ renews, so you decide in time instead of finding out on your statement. It keeps every other subscription in one place too. No bank login, no account.
Get a reminder before it renewsRecurra AI is not affiliated with Apple Fitness+. Cancellation flows and prices change — if a step does not match what you see, the provider's own help pages are authoritative.