Sling on POS

 I received an email that sling is now an app thats available to shopify POS, after installing and signing up for the business plan it still isn't showing up in POS. I emailed tech but haven't heard yet. Also called shopify support and she hadn't heard of the new POS app yet so she was unfamiliar. Has anyone had success with it for punching in staff?

1 year e-commerce, 7 years B&M store.