Shopify Ad Click Attribution Without Relying on Cookies

Shopify App Store
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1

Hey everyone!

I’d really appreciate any advice or guidance on this.

Is there a recommended way to know which Shopify shop clicked on my ads and reliably maintain that attribution throughout the installation process?

Currently, we have the following flow:

  1. The ad redirects to a URL on our own domain.
  2. That URL receives the click and triggers a request to store the ad_stamp in an HttpOnly cookie.
  3. We then redirect to our app’s Shopify landing page so the merchant can install it.
  4. Once installed, our embedded app tries to read that cookie and, based on the ad_stamp, determines how many trial days to grant.

The problem is that this approach is not reliable in some scenarios, mainly Safari/ITP and incognito browsing, where third-party cookie restrictions prevent the cookie from being available when the app tries to retrieve it.

What would be the best practice to handle this and reliably identify which shop originated the click, without relying on cookies that may be blocked?

Thanks in advance for any insights or suggestions!