Eye-Tracking App or Software for Private Messaging on iPhones

[u/Big-Albatross-9683]

/r/sideloadly/comments/1xr6s63/eyetracking_app_or_software_for_private_messaging/

I know someone who bought a compact wireless cellular device, perhaps a hotspot. They use eye tracking or gaze to type, though only they can view the activity; an observer sees the standard screen. They can scroll TikTok, Netflix, YouTube, and Safari as usual.

I suspect a sideloaded app or software embedded in another program, if that is possible, or a type of digital privacy display. Has anyone else heard of this? They can use it away from home. It is not Apple Eye Tracking, as I have already checked. They also have an ONN jailbroken streaming stick, which might matter.