Contacts question

Contacts question

I am a little confused about how the contacts in the different apps interact with each other. I assumed that if I added a contact in Zoho Contacts Manager that it would automatically show up in the contacts tab under Zoho CRM. When I look at the two it appears as though they are not related and I have two sets of contacts.

My question - is this correct? Is there a way to sync contacts across all Zoho apps?

Thanks in advance for clarifying this issue for me.