My wife and I will be sharing some Apple devices with the same Apple ID. Two of them will (we hope) have WhatsApp activated with different phone numbers. Will the Apple ID interfere in any way?

I already know how to make FaceTime independent, and I understand about "Family Sharing" for purchases, but we want the same contact list (AddressBook) and Apple doesn't support that.


The messages won’t be interfered with as that is stored by phone number. Backups will clash though as 2 different backups will be created of separate chats. One could be deleted at any time and the other device could be backed up.

If you want backup enabled I recommend using another Apple ID as it is backed up using iCloud.

From this WhatsApp article:

To make a manual backup of your chats at any time, go to WhatsApp > Settings > Chats > Chat Backup > Back Up Now. You can also enable automatic, scheduled backups by tapping Auto Backup and then choosing your backup frequency. This will back up your chats and media to your iCloud account and you can choose to include or exclude videos from the backup. The iCloud backup process can take a while to complete, depending on your Internet connection and backup size.

The WhatsApp messages will be different but FaceTime conversations will be linked as it is Apple ID linked. Bear in mind without backup chat history can be lost.

You won’t be able to FaceTime to the same Apple ID devices but you can call each other on WhatsApp.

In FaceTime settings though you can select what you can be reached by and use different emails:

Go to Settings -> FaceTime and choose how you can be reached:


  • WhatApp history backup is not particularly important and each device will have it's own history local. We can share purchases from Apple with separate IDs but we also want to share some things that Apple doesn't support with separate IDs. And we want to be able to send WhatsApp (and FaceTime) from one device to another. – WGroleau Dec 30 '18 at 23:34
  • @WGroleau I edited my answer. To confirm WhatsApp is phone number based so it won’t be affected but FaceTime is affected as it is Apple ID linked. Beware though if you loose your chat history. You won’t be able to Face Time from devices to another but you can call on WhatsApp from one device to another. – user310476 Dec 30 '18 at 23:37
  • FaceTime can be set to use multiple e-mail addresses. If X@ISP.net is only on one device and Y@ISP.net only on the other, they can FaceTime each other using those instead of phone number or Apple ID. – WGroleau Dec 30 '18 at 23:40
  • @WGroleau in FaceTime settings you can change what you can be reached by – user310476 Dec 30 '18 at 23:43
  • That's what I just said. – WGroleau Dec 30 '18 at 23:50

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