Spotify++ allows you to have all of the same features of spotify premium at no cost. In the past a jailbreak or APK file may have been required to download Spotify++, but is no longer required due to injection methods. Once injected on a users device, they will have access to the same music library as premium users. The injection is only required one time and updates automatically.
To begin using Spotify++, simply tap or click the inject button above. Follow the directions and it will successfully install to the device you are using. Once finished, open the app, search for your songs, and hit play to begin listening.