Looking for an app for a duplicate screen...

[hankinid]

Trying to find an Android app that would let me use an Android tablet as a second display for an Android phone.

I'm using a Garmin A50 (aka Garminfone) for boondock gps, but I'd like a larger display.

I-display is close, but it simply lets you use a PC or Mac as an additional display, not an Android device.

Thx for any help.

Steve