EAS Update download performance

Track how long EAS Update OTA bundles take to download on real user devices, with per-update breakdowns in the EAS Observe dashboard.

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EAS Observe automatically tracks how long each OTA update takes to download on real user devices. You don't need to add any instrumentation: if your app uses EAS Update and includes expo-observe, EAS Observe collects download metrics for every update fetch.

Update download times appear in the EAS Update tab of the EAS Observe dashboard and are queryable from the EAS CLI.

View update downloads

In the dashboard: open your project and navigate to Observe > EAS Update. The tab has two sections: an aggregate chart and a per-update table.

Update download time

A single chart showing aggregate download time across all updates fetched in the selected time range. Statistical breakdowns mirror the App startup tab: Median, Avg, Min, Max, P90, and P99. Use these to spot regressions in update size or CDN latency.

Update markers on the chart indicate when each update first downloaded. Click a marker to see the update ID, version, and metrics at that point.

Recent updates

A per-update table listing every update fetched in the time range, with the following columns:

• Update: the update ID and message.
• Downloads: number of unique devices that downloaded the update.
• Median download: median download time for that update, visualized as a bar relative to the slowest update in the table.
• P90: 90th percentile download time for that update.
• First downloaded: when the first device fetched the update.

Sort by Downloads, Median download, P90, or First downloaded in ascending or descending order. Click a row to drill into the individual download events for that update.

From the CLI:

Run eas observe:metrics-summary --help or eas observe:metrics --help for the full list of flags (time range, platform, app version, update ID, and more).