If you purchased your subscription from Apple iTunes App Store, go to the Electric Objects App:
Go to the Profile tab (located bottom right on the tab bar), tap the Account Settings gear below your username, and select ‘Settings’. From here, you will be able to click ‘Manage subscription’ which will redirect you to the iTunes app store to update your subscription preferences.
If you purchased your subscription anywhere else, log on to your account via the web browser:
In the web browser, once you have logged into your account, click on your username in the top right corner and navigate to ‘Settings’. From there, you will be able to sign up for Art Club or cancel your subscription on the ‘Billing’ tab.