Amusingly, my first bike pump didn't have a gage, but I figured out that putting all of my weight on it would produce the correct pressure for my bike.

I think it's worth having a floor pump for at home, just to make it more convenient to maintain good pressure, depending on how fast your tires bleed down. I've made a habit of observing how much my tires pooch out under my weight. That makes it easy to check the pressure when I'm out riding, and to know if I've got a slow leak.

Using a mini pump for daily use gets old in a hurry, in my view.