Bulletin: First install attribution for post-reinstall in-app events

This enhancement attributes all in-app events and sessions following a re-engagements or a re-attribution to the original media source that drove it (’first install’) rather than labeling them ‘organic unattributed.’

July 31, 2024. The first-install mode automatically applies only to apps added to AppsFlyer on or after the effective date. For apps added before July 31, 2024, we recommend contacting AppsFlyer to migrate your existing apps to the first-install mode.

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Post-reinstall in-app events can only be attributed to the first installer if they include an advertising ID (for example, IDFA or GAID). Otherwise, they will be labeled as ‘organic unattributed.’

• For apps added to AppsFlyer after July 31, 2024: No impact
• For apps added before July 31, 2024, we recommend contacting AppsFlyer to migrate your existing apps to first-install mode. After the migration, the following may occur:
  • A potential increase in the number of in-app events and sessions attributed to the first install following a reinstall, along with a corresponding decrease in the attributions classified as 'organic' for such events.
  • A potential increase in the MAU (Monthly Active Users) count for media sources attributed originally and a decrease in the MAU count for organic sources.
  • On the day when the app switches to first-install mode, the session count doubles. As a result, the day 1 retention rate for the cohort is unusually high.