Does Zoho have a pre-made app that I can organize the following information.

Client Info

Name, address, etc.

Seller/storefront info

Name, links, notes

Be able to link a seller to a particular client

Business/individual info, notes, attachments

Then be able to link a client to individual sellers for example where a client is monitoring 30 different sellers, it would show a list of those sellers under the client name, or where a different client is monitoring the same sellers so the same seller would show under different clients.

Searchable where I can find seller names previously entered or even show some kind of chart showing connections between sellers or be able to associate different sellers together.

Be able to invoice the client referencing particular sellers from the same app or dashboard.