User Journeys in a Post-Privacy World: Why Measurement Needs a Rethink

By Craig Parker, Product Manager at RealityMine

We’ve never had more ways to discover new products, content, and services. TikTok inspires your dinner. YouTube recommends your next holiday. ChatGPT gives you the summary of it all — no need to scroll, search, or click through ads.

But while discovery is evolving rapidly, our ability to understand what users actually do is quietly fading.

Third-party cookies, mobile ad IDs, and cross-platform tracking — traditional tools we've relied upon — are vanishing. App Tracking Transparency (ATT) opt-in rates dropped from 73% to around 25% by 2024. Google’s advertising IDs (GAID) are facing deprecation. Third-party cookies will account for less than 1% of web traffic by 2026.Understanding the journey from inspiration to action is more valuable than ever — not just for marketers, but for product teams, researchers, and strategists striving to create better digital experiences.

The Problem?

Modern user journeys don’t follow a neat funnel anymore. They skip, repeat, and blur across platforms. Here’s what these journeys may look like:

  • While scrolling Instagram Reels, the user sees a slick ad showing a modern air fryer in action
  • Curious, they browse TikTok and watch short videos like “Easy air fryer dinner ideas” and “3 healthy air fryer meals”
  • They head to YouTube and watch “Best air fryers 2025 – Which one should you buy?” for a deeper review
  • They then spend 5 minutes in the ChatGPT app, likely continuing their discovery or comparing models (event duration tracked)
  • They search for “air fryer” on the Amazon app, view several listings, and add one to their basket
  • The journey ends with a purchase on Amazon

That entire path happens in minutes, across different apps, some with zero shared tracking infrastructure.

We’re not just talking about a shift in devices or channels. This is a fundamental reordering of how discovery, decision, and purchase unfold. And that means measurement needs to catch up.

The Challenge: We’re Losing Sight of the Journey

As these cross-app journeys become more complex, our ability to follow them is eroding. Meanwhile, users are increasingly relying on private browsing, in-app web views, and AI assistants, leaving fewer visible traces than ever.

This isn’t just a technical problem. It’s a strategic blindspot. When you can’t see the steps users are taking — or even which platform they’re on — you risk optimising based on assumptions, not reality.

What I See from a Cross-App Perspective

In my work analysing behavioural data across mobile journeys, I’ve seen how real-life patterns break the mould of what most dashboards capture. Examples that continue to fascinate me:

  • Ride hailing: How long does someone wait before cancelling a ride request — and what patterns influence that decision?
  • Food delivery: Do discount codes nudge people to try new restaurants, or do they just bring back existing customers?
  • Streaming and shopping: Does seeing an ad on YouTube lead to a product search on Amazon, or does it stop at inspiration?

When you can see cross-app behaviour — not just isolated events — you start to understand intent.

The Big Opportunity Ahead

We’re entering an era where users control their own discovery: AI tools, private browsers, and in-app browsing all reduce traditional data signals. But people are still making decisions. They’re still buying, searching, switching apps. And if we can map those journeys — not just track the endpoints — we can gain better insight into the “why,” not just the “what.” This opens up bigger questions:

  • When do people choose to search in Google vs.ask ChatGPT?
  • What actually triggers a purchase — an ad, a friend’s post, a search, a promo, or a combination?
  • What counts as “top of funnel” anymore?

Final Thought

The measurement industry is facing a turning point. The traditional tools may be fading, but the need to understand real user behaviour is only growing. The organisations that invest in mapping and interpreting the full journey — not just the last click — will have the edge. Because in this new landscape, it’s not just about where users go.
It’s about how they get there — and what that tells us about what matters most.

About the Author

Craig Parker is a Product Manager at RealityMine, where he leads the development of mobile app and web measurement solutions. With over a decade of experience spanning project delivery, UX optimisation, and data-driven SaaS products, Craig specialises in turning behavioural insights into strategic value. He’s especially interested in how emerging technologies like AI are reshaping user journeys across the app ecosystem.

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