Integration from Pipedrive to Zoho CRM

Integration from Pipedrive to Zoho CRM

Hi all,
In details, I am migrate data from Pipedrive to Zoho CRM, but I found out some obstacles which makes me concerned on migration function based on API key.
1. Is it only happened on Call module and specific fields? (and before it, Lead and Contact will be imported by CSV files)
2. Are there any different ways to do it?