What is a staged rollout — Articles
Blog post from Expo
Staged rollouts reduce the risk of mobile releases by initially delivering an update to a small group of users, monitoring crashes, performance, and feature-specific metrics, and expanding only when results are acceptable. Apple’s App Store uses a fixed seven-day phased-release schedule that can be paused but cannot prevent manual downloads or undo installations, while Google Play allows teams to choose and manually increase any rollout percentage and halt distribution when problems arise. Both store-based approaches cannot truly roll back an installed binary; affected users require a subsequent fixed release. Over-the-air updates for React Native applications offer more flexibility for JavaScript and asset changes, enabling custom rollout timing and genuine rollback to a prior or embedded bundle, although native-code issues still require a store release and data migrations can make rollback unsafe. Effective monitoring compares the new version with the prior version over the same period, focusing on crash rates, launch and screen performance, failed updates, and outcomes tied to changed features such as checkout or onboarding. Expo’s EAS Update supports percentage-based and branch-based OTA rollouts, but only for compatible runtime versions, and recommends starting cautiously, observing error rates, then cancelling or reverting problematic updates.
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