Why Genki’s new Manta gamepad has touchscreen instead of companion app?

Accessory maker Genki has launched the Manta–a pro-grade wireless controller running its own Raspberry Pi-powered MantaOS on a built-in 2.79-inch color screen, featuring toolless adjustable TMR joysticks, TriStage Hall-effect triggers with multiple game modes, and up to 8,000Hz polling.