Do streamers NEED this Elgato Prompter?

Elgato is back with another product that is sure to elevate anyone's live-streaming experience: Elgato's very first prompter! This lightweight prompter allows video streamers to maintain crucial eye contact with their audience without the bulk and hassle of a full-sized teleprompter setup!
0:00 ► New thing alert!
0:43 ► Kit Overview
4:15 ► Elgato Camera Hub
6:45 ► Who's it for?
You can rent the Elgato Prompter using the link to our website below!
Elgato Prompter ► tinyurl.com/5y9excae
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[@VictorDiGiovanni]

I'd want to use this on a remote shoot. How easily (if at all) does it hook up to a phone or tablet?

[@lensprotogo]

After looking into this, it appears the Camera Hub software is only out for Android devices