You can cancel your eMeals membership online. To manage your subscription, go to the eMeals Member Area: here. Follow the prompts until you get a screen that confirms you have canceled your subscription.
To avoid future charges, cancel your subscription prior to your renewal date. For example, if your term renews on July 29th, then cancel on or before July 28th to avoid any future charges.
You will still have access to your account until the end of your subscription.
Deleting the app from your smart device will not cancel your subscription.