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

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Sticky Posts
Zoho Invoice Will Soon Discontinue Support for Older Browser Versions
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Hello, We are happy to announce the much requested and much awaited feature in Zoho Invoice - Bulk Printing of Estimates and Invoices. All you need to do is, select the invoices you wish to print and then click the 'Print' button. All the invoices will be downloaded as a single PDF file which can be printed as you wish. You can print upto 25 invoices at a single go. Go ahead and give it a shot and let us know how it worked for you. Regards, Reshma
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Now you can invoice on the go from your iPhone through the Zoho Invoice iPhone app. Our iPhone app is available at the apps store for download. The app is special in more ways than one: An impeccable UI takes your invoicing experience to a whole new level That's a first native app we've come up with It's available for FREE!!!!! Yeah, absolutely Free. No brainer there, we just wanted to make our users to enjoy the app no strings attachedHere some snapshots of the app: For the real experience, head