Thermocouple support is literally what I’m working on right now. It will come to Android first. And putting the meter in the freezer is a good test, but when the case of the meter is closer it is quite well insulated and the temperature will change very slowly.
I’ve been doing all my work recently in the dev2 branch of the Android repository. It’s still not quite fit for public consumption, but if you are interested in Android dev and the Mooshimeter, feel free to take a look!