Zoho CRM Modules vs Zoho Creator

Zoho CRM Modules vs Zoho Creator

Hello!  I am new to Zoho and I have a couple of questions...

I have two modules that have a parent child relationship (Contract...parent and Detail...child).
While I can make two modules in Zoho CRM, I do not believe that I can create a screen where the Contract is the primary and the Detail is shown in a subform...correct?

If this is the case, this means that I have to create an app with Creator.  If I do this, is there any documentation that shows how I can access Zoho CRM data from a Creator app? (I will need to access data from the Accounts module in my app)

Thanks!