How do I cancel my Yummly paid subscription if I signed up through iOS?

How to cancel a subscription on your iPhone, iPad, or iPod touch

1. Open the Settings app.
2. Tap your name.
3. Tap Subscriptions.
   
4. Tap on Yummly.
5. Tap Cancel Subscription. 

If there is no option to Cancel the Subscription, then your subscription is already canceled and Apple will not renew it.