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What is it about?
But that changes, sort of, with Watchify. Instead of being a full-fledged client on the watch, the app allows you to control Spotify playback on the iPhone. So it’s a perfect option if you’re already connected to headphones on the handset.
App Store Description
Watchify is a Spotify client for the Apple Watch built using the Spotify iOS SDK. A Spotify premium account is required to use Watchify.
Watchify allows you to chose from your Spotify songs and playlists and play them from your iPhone. This is ideal if you're wearing headphones that are already connected to your iPhone.
Watchify allows you to pause, play, skip, and replay songs just like the official Spotify app directly from your Apple Watch.
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