You can subscribe to STARZ through Sling TV but this subscription does not provide access to the STARZ app.
How to subscribe to STARZ through Sling TV:
On a computer:
- From the Sling TV website, select Member Sign In
- Sign in to your Sling account
- Select Change Subscriptions
- Expand the list of offerings for the current package
- Then check STARZ
- Scroll to the bottom and click Review
- On the following page Submit Order