Did you know–I did not, which is why I am telling you–that they sell little compressor dealies that will plug into the cell phone charger slot in your car? (It is not either the cigarette lighter. Ours never once came with a thing that would light cigarettes. It is the cell phone charger.) So that if you regularly go places that are so cold that a) your tires will deflate somewhat and b) the air hoses at gas stations will freeze, then you can just carry this solution along with you in the car, and it is a very small box and reads out the pressure for you so you can tell how long to run it?
Obviously this is not a solution if you have shredded a tire so badly that it is more of a tire fringe than a tire. Very few things are a solution to that, and you probably already know what they are. But if you have a slow leak, or if you are just in the cold conditions described above and your tires are fine, then you can have this lovely little gadget that will set your mind at ease about being stranded somewhere with mildly flat tires. Or if you worry about someone else you know who goes places where this might apply, then you can stop worrying about them. The nice-ish ones are $30. They sell even less-nice ones for less than that. It is a thing that should be known. So now you know it.