Visual Testing for React Native Storybook

With Storybook, each UI variant is defined upfront, so Sherlo can screenshot it instantly and deterministically across many devices, themes and languages - without replaying long E2E flows or relying on live data to set up the component in a desired state. That gives you fast, stable visual coverage from components to full screens, while E2E tests stay focused on what they're best at: validating real user paths.

Sherlo gives you visual coverage that's impractical to achieve manually. Instead of checking every screen, device, and variant by hand, Sherlo does it automatically and only asks you to review what actually changed. That saves hours of QA time on every release, catches regressions before users see them, and keeps your UI consistently polished without slowing your team down.

Setup is quick. Sherlo integrates with your React Native Storybook in just one CLI command - your stories become the test cases automatically, so there's nothing extra to write. See our Sherlo setup documentation for the full setup guide.

Not if you don't want to. Sherlo normally needs a new app build for changes, but with EAS Update you can reuse the same native binaries and update only the JS bundle. That turns most UI changes into a fast "publish & test" loop instead of a full rebuild. See EAS Update getting started guide to follow an easy and fast EAS Update integration and our testing with EAS Update for more details on how to run tests with EAS Update.

Sherlo runs on a wide range of iOS and Android simulators tuned for reliable visual output. Simulators give you the most consistent environment for UI screenshots, and let you test across many device configurations in parallel. You can see the full list of supported devices in our supported devices list.