Using a tablet or phone as a field monitor, any success stories?

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I'm trying to avoid the obvious.....buying a "proper" field monitor, there would need to be quite a domestic inquiry and I've spent a lot recently.
I have a Samsung Galaxy Tab A and an unused Samsung phone to choose from and I will be trying to pair them with a Sony A6000 and Sony 90mm macro lens for extreme macro focussing in the field.

So far I've tried the two available Sony apps for both wired usb connection or wireless connection, both without success. I'm not trying to control the camera through an app, merely want to get a good view of the object for fine focussing.
Be grateful for any comments even if it's "don't bother"!