Is There a Retention Rate for Free Users?

The question will surround if two groups of users o the free users and the paying users, and some of them are very active. And what's the retention rate for the free users? Do that change ones thestart paying a then i will look ate conversions, or like, how wone % of the free users am i converting to paid? There's many different ways to do that. But ultimately, to the extent that you should be growing all of this, it comes down to how much usage you have from thes the one the users that you value.