How do I disable Contact Syncing?

iPhone:

1. Go to the iPhone Home screen 

2. Go to 'Settings' app > 'Passwords & Accounts' 

3. Tap 'Haystack'

4. Toggle account to 'off'

This will be remove all Haystack cards from your phone contacts.

Android:

1. Tap on the 'three lines' at the top > Settings

2. Toggle 'Contact Syncing' to be off