Ensure unique profiles across web, ios and android

[lego-sharat]

My usecase is this:

• I have a website where klaviyo is integrated.
• I am making android and ios apps. I want to ensure that a user doesn't have duplicate profiles across these channels
  How should I go about doing it?

[evan-masseau]

Welcome! Great question. The SDK has methods to provide an identifier corresponding to the user (e.g. email, phone number or a unique ID of your own devising), and Klaviyo will use that unique ID to merge different contact info into a single profile. For example if a user with the same email address logs into your iOS and Android apps, Klaviyo's backend will associate the iOS and Android push tokens to one profile based on the email. If you cannot provide an identifier right away (e.g. user hasn't logged in yet) you can still register a push token. Klaviyo SDK will create an anonymous profile which can later be merged with another profile once you have an identifier (e.g. once the user does log in with an email).

Here are two relevant articles from our Help Center that may clarify more than my quick explanation:

• General info on identifiers https://help.klaviyo.com/hc/en-us/articles/12902308138011
• An article about how profiles are merged, this one is written about SMS but the principals are the same for push. https://help.klaviyo.com/hc/en-us/articles/360035588012