Backbone just announced an officially-licensed PlayStation variant of their popular mobile phone controller, and you can pick one up right now on Amazon.
This version will feature unique integration with PlayStation app and the PS Remote Play app, including an update line that mimicks the PlayStation 4 and PlayStation 5 interface. As an added bonus, it also comes with a 3-month trial for Discord Nitro (and 2 months of Stadia Pro, if you're into that).
Backbone One iPhone Controller (PlayStation Edition)
NOTE: This iPhone controller works for many iPhone models, but you can also request an adapter for iPhone 13 Pro and Pro Max versions.
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