You can access iTunes in the AppStore in your iPhone. Then, you can delete iTunes in the AppStore by cancelling your subscription.
How do I unsubscribe from Hooked?
1. Go to iTunes in the home of your device.2. Tap Apple Store & App Store.3. Tap your e-mail and apple id, view apple id and enter your password.4. Now, tap Subscriptions.5. Tap on the “Cancel Subscription”.
How do I cancel Hooked on Phonics app?
You have to log in to your dashboard. Go to your subscription section. Tap the logo of your subscription to see if you need to cancel it.