Introducing Observe: Performance monitoring for Expo apps

EAS Observe is a production performance monitoring tool tailored for React Native applications, providing insights into how apps perform under real-world conditions by tracking metrics like cold launch, time to interactive, and bundle load across various devices and networks. While in open beta, it is free for up to 10,000 monthly active users, with plans for scalable paid tiers post-beta, maintaining a free tier for smaller apps. The tool fills a gap between development and crash tools by offering real startup metrics and performance insights out of the box, allowing developers to pinpoint slowdowns and performance regressions with detailed context such as device model and network type. Observe integrates seamlessly with Expo SDK 56+ and supports per-screen navigation metrics, offering custom events and session drill-down capabilities. Additionally, it includes integration with EAS CLI for querying metrics via terminal commands and is designed for agentic analysis, enabling setup and data analysis through intuitive commands. Future improvements include enhanced dashboard features, crash reporting, request timing analysis, and alert management, with ongoing development guided by user feedback.

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