EAS Observe

EAS Observe is a production performance monitor for Expo applications, built for teams that need timing evidence from real devices rather than development simulations. It is most useful to teams shipping frequent releases or OTA updates through EAS. Its focused performance scope is compelling, but the Expo SDK and build requirements rule out some projects.

Overview

Observe measures how an app starts, renders, becomes interactive, loads its bundle, and receives an EAS Update. Teams can compare those timings between app versions and OTA updates, making it easier to associate a slowdown with a particular release. The data comes from production use across real devices and conditions, so it addresses performance questions that local testing cannot fully answer.

The app must use Expo SDK 55 or later and be linked to an EAS project. Observe does not run in Expo Go; it requires a development or production build. That makes it a sensible choice for an Expo-centered release workflow, but not a general monitor for older Expo projects or teams that depend on Expo Go for their testing process.

Expo says the service collects performance timing data, device model, OS version, app version, and an anonymous install-scoped ID, without collecting personally identifiable information. Data is encrypted in transit and at rest, and Expo has SOC 2 Type 2 attestation. All EAS plans retain data for 90 days.

Key features

Startup metrics cover cold and warm launch time, time to first render, time to interactive, bundle load time, and EAS Update download time. Release and OTA comparisons turn those measurements into regression tracking rather than a one-time diagnostic.

Expo Router and React Navigation integrations add per-route render and interactive timings. This is valuable when the problem is a slow screen rather than a slow launch. Apps can send user-defined events with Observe.logEvent and analyze them beside performance data, allowing teams to relate user flows to release behavior.

Metrics are visible in the EAS dashboard and queryable through EAS CLI commands, which suits teams that want both visual investigation and terminal-based release checks. EAS Observe includes app performance monitoring and network request tracing. It does not provide ANR monitoring or session replay, so teams needing those capabilities will need another product.

JavaScript error reporting and native crash reporting are described as preview features. They may supplement performance analysis, but they should not be treated as a mature replacement for a dedicated error-monitoring workflow.

Pricing

The Free plan costs nothing, billed at $0 per month, and includes 100K events per month with 90 days of retention. It is a practical starting point for small apps or teams validating whether timing data is useful, but the event ceiling can become restrictive as usage grows.

Starter costs $19 a month, billed at $19 per month plus additional usage cost. It includes 500K events per month; usage beyond that is charged according to usage-based pricing. This is the clearest fit for a smaller production app that has outgrown the free allowance.

Production costs $199 a month, billed at $199 per month plus additional usage cost, with the same 500K-event allowance before usage-based charges. Its higher fixed price needs to be justified by production-scale operational requirements; the published allowance itself is not larger than Starter's.

Enterprise uses custom pricing and includes 500K events per month before usage-based pricing. It is aimed at organizations that need a tailored commercial arrangement. Every plan has 90 days of data retention, so none is designed for long-term historical storage.

Platforms

EAS Observe supports Android, iOS, and tvOS, with platform filters in the dashboard and CLI. The service is also categorized for web use, but the documented device metrics and Expo build requirements are centered on EAS applications.

Who it's for

Choose Observe if your team ships Expo SDK 55-or-later applications through EAS and needs release-by-release evidence for startup, route, bundle, update, or network performance. It is especially appropriate when OTA updates make regression comparison important and when CLI access belongs in the release workflow.

Look elsewhere if you need Expo Go support, ANR monitoring, session replay, or fully established crash reporting. Projects outside the Expo/EAS ecosystem will also find its requirements unnecessarily narrow.

Pros and cons

Pros

• Real-device production timings expose regressions that development testing can miss.
• Version and OTA comparisons connect performance changes to specific releases.
• Route integrations and custom events add useful context beyond launch metrics.
• Dashboard and CLI access support both investigation and scripted workflows.
• 90-day retention and stated encryption practices provide a clear baseline for operational data handling.

Cons

• Expo SDK 55+, an EAS project, and a development or production build are mandatory.
• Expo Go is unsupported, limiting teams that rely on it.
• ANR monitoring and session replay are absent, while crash reporting is still preview-stage.
• Starter and Production both include 500K events before additional usage charges, and every plan retains data for only 90 days.

Alternatives

For a broad mobile-monitoring directory, see Mobile App Monitoring.

Guance Container Monitoring is the better direction when you need wider platform coverage, host and log monitoring, or a free trial alongside its freemium offering.

Pick BugSnag instead when a freemium service with broad platform coverage, user-based access, event quotas, and spans is a closer match.

Middleware suits teams seeking a broader observability platform with RUM sessions, synthetic checks, browser tests, and generous free-tier data allowances.

Choose Appelium when a one-app, one-user free tier covering iOS, tvOS, and Android is preferable.

Bugfender is an alternative for teams prioritizing high-volume log capture, device coverage, and team access.

Firebase Cloud Messaging is the choice when the requirement is no-cost cloud messaging rather than performance monitoring.

OpenReplay is better suited to teams wanting self-managed session-oriented observability and flexible storage control.

Rejourney fits teams focused on session replays, funnels, and cohort trends instead of Expo release timings.

Verdict

Choose EAS Observe for an Expo SDK 55-or-later team that wants production performance timings, OTA regression comparisons, route detail, and custom events in the EAS dashboard and CLI. Its strongest advantage is focused release-performance evidence. Look elsewhere if your priority is Expo Go compatibility, mature crash and ANR monitoring, session replay, or broader platform-independent observability.