The GameSir X5s is one of the cheapest ways to connect a controller to your iPhone , and is worth consideration even with all of the compromises baked in. GameSir X5s review: Playing console-quality games on an iPhone never gets old When I say that the X5s is one of the cheapest controllers around, I'm not joking. At just $50, it's easily the least costly iPhone controller I've used. With that in mind, I went into my time with the GameSir X5s with low expectations. I was concerned that the gaming experience would suffer from the corners being cut to meet the $50 price point. Continue Reading on AppleInsider | Discuss on our Forums