Charge for Unity Pro at end of trial?

When I try to get the 30 day free trial for Unity pro am I going to be charged the money for the program at the end of the 30 days or will it just be like a netflix type thing where I give them my information incase I want it afterwards but don’t actually pay until I decide if I want it or not.

The registration is due to licensing, but there’s no obligation of paying when the trial ends. All that happens is that you’d have to buy to be able to continue to use Pro, or go back to the Indie version of Unity.