how to cancel a starz subscription purchased through my Apple tv 4th generation device. I only have an android device.

You can cancel this subscription on your Apple TV.

Settings﹥Users and Accounts﹥[You]﹥Subscriptions﹥[enter account password]﹥[select active subscription]﹥Cancel.

See or cancel your subscriptions - Apple Support

Manage subscriptions from Apple if you don't have an Apple device - Apple Support

• Cancel more subscriptions without a Windows PC
  • Contact Apple Support to cancel your subscriptions.