HDMI adapters are a dime a dozen. Pick some random crap and save yourself the money, as long as they reasonably work they'll "disappear" faster than a crate of beer...

You don't want to risk damaging an expensive phone/laptop/TV by plugging in the absolute cheapest unbranded cables/adaptors etc if there's a trustworthy brand available.

And with some electrical stuff, such as power strips and chargers, there might be safety issues/fire hazards too.