Firebase Analytics Mobile

Firebase Analytics is Google's event tracking platform for mobile apps (iOS, Android) and web. You log events in your app (user tapped button, viewed product, completed purchase). Firebase collects and sends events to Google Analytics. Dashboards show user funnels (what % of users completed the purchase?), cohorts (users acquired from referral vs organic), retention (% of users returning after 1 day, 7 days), and custom insights. Firebase Analytics is free, has tight SDK integration (especially Android), and exports raw events to BigQuery for custom analysis.