Beginning with SDK 40, we will be trying out an SDK beta release period for approximately one week before the final release. The beta release is an opportunity for developers to ensure that the new release does not introduce any regressions for their particular system and app configurations.

This is no substitute for rigorous internal testing, but we can only cover so much of the surface area on our own. …

Today we released an update for Expo client on iOS and Android to add support for the SDK 33 runtime. We haven’t yet released SDK 33, but it’s coming very shortly: updating the clients is just one part of the release process. (Normally, we release the updated client quietly; the reason we’re writing an advance post this time is that this release of the client drops more SDK versions than usual, and removes background location support from the App Store version of the iOS client.)

Update on June 7, 2019: Expo SDK 33 is now live! See the release notes here: https://blog.expo.io/expo-sdk-v33-0-0-is-now-available-52d1c99dfe4c

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Starting today, you can use as little or as much of the Expo SDK as you like in any React Native app. We’ve spent a lot of time building and maintaining these cross-platform APIs for native features, and we’re happy to finally share them with the entire React Native ecosystem and to continue evolving them as a together.

The two main workflows for Expo going forward are referred to as “Managed” and “Bare”. Managed apps are built with the expo-cli, the Expo client on your mobile device, and our various services: push notifications, the build service, and over-the-air (OTA) updates. Expo tries to manage as much of the complexity of building apps for you as we can, so we call it the Managed workflow. Bare apps, on the other hand, give all of the control (and the complexity that comes with it) to the developer. …

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