If you have purchased Newzik Pro from the App Store: 

You can manage your app subscriptions by completing the following steps:

1) Open the Settings app on your iPhone or iPad

2) Tap your name at the top of the page

3) Under your profile, select Subscriptions

4) Tap the subscription you wish to manage, in this case, Newzik

5) If you don't want to continue the subscription, tap the button that says Cancel Subscription

If you have purchased Newzik Pro from our website:

1) Open Newzik (web.newzik.com) from a web browser

2) Open your account section and click on "Manage plan and billing" 

3) Chose the "Cancel Plan" option