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LabMobile analytics without cross-app tracking · 2026 reality

Post-ATT, cross-app tracking is dead for most users. Here's the first-party analytics setup we ship: what you can know, what you can't, how to decide.

From the archive4 sections · 2 min readBy Dezső Mező · Published .mdMobilePrivacyAnalyticsiOSATT

App Tracking Transparency shipped in 2021. By 2026, the dust has settled: ~65% of iOS users decline tracking across apps. Cross-app attribution is essentially dead for most consumer apps. This is how we actually run analytics on mobile apps we ship.

01What first-party analytics can still measure

  • In-app events · every screen view, tap, scroll, feature use
  • Session duration + frequency
  • Crash-free session rate
  • Conversion from activation → paid (within your app)
  • Retention curves
  • Anonymous device properties (OS version, device class, locale)

02What it cannot measure

  • Which ad drove the install (for users who declined tracking)
  • Cross-app behaviour (do my users also use X?)
  • Personal identifiers like email or IDFA without user consent

03The stack we ship

  1. PostHog or Mixpanel SDK on-device for event capture
  2. Authenticated user ID joins server-side · user-consent implied by login
  3. Cohort-based A/B testing · not individual-level random assignment
  4. Apple Search Ads + SKAdNetwork for post-install attribution (limited, but legitimate)
  5. Privacy manifest + ATT prompt handled gracefully in onboarding

04How we make product decisions

Product decisions on cohorts + retention curves · not individual tracking. 'Users who completed onboarding within 48h retain 3× better in week 4' is a decision signal. 'User XYZ did N things in sequence' mostly isn't, post-ATT.

If your product manager still demands user-level funnel reports, ship those only for logged-in + consented users. Design the product so key events happen after login. Post-ATT analytics is a design choice, not just a measurement choice.

What to take away

  • Post-ATT, ~65% of iOS users decline tracking. First-party analytics · PostHog / Mixpanel on-device events, server-side joins via user ID, cohort-based A/B rather than individual tracking. The 2026 mobile analytics stack.
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