Zoho API

Zoho API

Can Invoice work with the Contacts or Calendar or Tasks or any other Zoho API?

I need to make a decision on integrating my business - I NEED help keeping my 3 user business working.

I need:

  
  • I want ONE table of clients & accounts.
  • I need an invoicing module to link to the clients. 
  • I need the clients / accounts to link to the emails (so I have a record of conversations)
  • I need file storage, and tasks management
  • I need files attached to clients
  • I need tasks attached to clients or calendar
  • I need calendar able to link to clients


This doesn't seem to be a ridiculous request to me, but I canNOT find the email integration anywhere!!  Do you have anything close?  Any combination of modules that will work for me?

Thank you so much,
Cathy