IDroid

The iDroid was a hand-sized device resembling a walkie-talkie that supplied a holographic map of an area.

It was utilized by Big Boss during his infiltration of Camp Omega, in order to rescue Paz and Chico from the camp, the former of whom so they'd gain any leads to Cipher. Its projection area referred to it as a beta, implying that the device was created only very recently by the time of the mission.

Behind the scenes
The name of the device was portemantau of the Google-made Android phone, and the Apple-made iPhone.