EAS Observe

EAS service - costs apply. EAS Observe is a paid Expo Application Services product with free-tier limits. Ingesting and querying production metrics counts against your plan's event/usage allowance. Review https://expo.dev/pricing before enabling it in production.

EAS Observe tracks startup, navigation, and custom-event performance from production Expo apps.

Source of truth: https://docs.expo.dev/eas/observe/ — always consult the canonical docs when API details matter, especially get-started, configuration, integrations, and the metrics reference. EAS Observe is evolving; this skill's references are written to stay accurate but may lag the docs.

Which reference to read

The three reference files in ./references/ cover the three things people typically need this skill for:

• Adding EAS Observe to a project → ./references/setup.md. Install, wrap the root layout (AppMetricsRoot on SDK 55, ObserveRoot on SDK 56+), call markInteractive() (global on SDK 55, via the useObserve() hook on SDK 56+), optional per-route navigation metrics through the Expo Router / React Navigation integrations, and user-defined events via Observe.logEvent (SDK 56+).
• Querying metrics from the terminal → ./references/queries.md. The five eas observe:* commands — metrics-summary, metrics, routes, events, versions — with flags, table layouts, JSON shapes, and common workflows.
• Reading a dashboard or CLI output → ./references/metrics.md. Target thresholds per metric, what the TTI frameRate.* params mean, and diagnostic patterns for telling slow-but-smooth startup apart from main-thread contention or hard blocks.

Quick links to the docs

• Get started: https://docs.expo.dev/eas/observe/get-started/
• Dashboard guide: https://docs.expo.dev/eas/observe/dashboard/
• Metrics reference: https://docs.expo.dev/eas/observe/reference/metrics/
• Expo Router integration: https://docs.expo.dev/eas/observe/integrations/expo-router/
• React Navigation integration: https://docs.expo.dev/eas/observe/integrations/react-navigation/
• User-defined events: https://docs.expo.dev/eas/observe/events/
• Configuration: https://docs.expo.dev/eas/observe/configuration/