The logic behind the Logitech ZeroTouch is solid: Build a device that will mount almost any Android phone in a car and let it be controlled solely by voice, so that you can get directions, make a call or answer a text without having to touch — or even look at — the display.

The execution, however, leaves a lot to be desired.

There are two versions of the ZeroTouch. One runs a little under $80 (Amazon price), comes in black and sticks to the top of your dashboard or to your windshield via a suction cup. A second costs about $60 (Amazon price) and is available in black, red or white; you clip it to the slat of an air vent. I reviewed the latter, although they’re functionally the same.

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