WhatsApp has your account information such as Phone number; name attached to the account, the current profile photo of your WhatsApp, the device that is being used and time of being online.
It also has all your contacts, name of the groups which you are part of, device type, IP address, device build number, device manufacturer and the platform which is used for WhatsApp Web.
The WhatsApp has all the contacts with whom you chatted and it only has the mobile numbers of those chats. It also has the information about the settings of the app, which includes privacy settings for Last Seen, Profile Photo, About Privacy and Status Privacy. It has the list of numbers you have blocked and whether the Read Receipts is turned on.
WhatsApp does not keep data on call logs
WhatsApp has clarified that it does not keep a tab of call logs.
WhatsApp only has the list of the phone numbers with which you are chatting and numbers of the people with whom you’ve messaged in the past. It does not include the name of the particular contact.
WhatsApp only has the name of the groups you are currently part of and any groups which you were part of earlier. It does not have any other detail about the groups such as group members, group description, group icon photo or anything else.
Profile Photo and Status shared with Facebook