Implementing Spotify into an app without having Spotify downloaded

[connorgronski]

Hi - what is the best way to go about implementing Spotify, either through an API or Spotify iOS SDK, into an app where the user does not need to have Spotify downloaded on their end? I'm looking to implement Spotify into an app for better user engagement, but don't want app users to have to log in or download the app. 

Plan

Free/Premium

Country

Device

(iPhone 8, Samsung Galaxy 9, Macbook Pro late 2016)

Operating System

(iOS 10, Android Oreo, Windows 10,etc.)

My Question or Issue