I have my marketing site https://diffy.website and my app lives at https://app.diffy.website. I have configured cross domain tracking and registration event. Meanwhile, I want to exclude my app users when they simply go to app.diffy.website. How can I do that? So I want to track only visitors who started at my marketing site.
I have tried to create a view filtering by a hostname but then I loose my event tracking.
I have rebuilt the way I track my visits. I have disabled analytics on my app and now tracking click event on "Try for Free" button with Google Tag Manager. Will get to more sophisticated event tracking from the app later.
I would suggest you to take a look to Google tag manager, it allows you to filter events and integration between domains. It also can help with debugging Events and unifying all JS integrations (GA, FB, etc.) on a single JS script.
I’m a little unclear about what you’re looking for.
Do you want to see sessions in app that only began on the marketing site? Or do you want to see sessions by visitors who at some point in the past began on your marketing site? Or something else?