Cloudkit Can we modify data of public database

Question

I have just gone through the cloud kit doc as in this link cloudkit but not getting clear about to modify database records for public database. As per this description in cl

Answer 1

if you set your security setting within the record types on the dashboard, you can have all your public records set to be writeable by anyone without messing with the security roles.

Set Authenticated to Write
Set Creator to create.

p.s. you cannot 'world' read from the simulator, you need to be logged in on that. On the device though, you don't need to be logged in to read the public database :-) which is nice.