The pucks are useless because it only shows you a tiny snapshot in time so you might think you're fine when you're not, or you might get scared by a high result that just happened to be a short term spike. Sounds like you know this.
To my knowledge most people are using these:
https://www.amazon.ca/Corentium-Airt...7105168&sr=8-5
It shows you 1 day average, 7 day average, and a constant average over time. They are also extremely accurate if placed properly. Radon has a cumulative effect on your health which is why short term readings are largely useless in terms of what you might find in your home.