Locale X is a major new version. For all of the new features in Locale X, please see the Locale X release announcement. 10.0.343 is a minor update with the following improvements:

Fixed in-app warning and notification for the Brightness setting on devices without a light sensor
Improved reliability of the background service on Samsung devices
Improved performance of the app, especially when the background service first launches
Optimized memory usage

Note: Avast antivirus is overly protective about the system-level permissions that Locale X needs in order to change device settings on your behalf. We normally upload Locale X to Avast’s whitelisting server, so that the app doesn’t get flagged. However, Avast’s server is currently down so this update has not been whitelisted. We don’t want to delay releasing improvements to the app. If you use Avast and receive a message that this Locale X update is potentially dangerous, you can safely ignore this message.

Note: As a normal part of our release process to ensure high quality, updates to Locale X roll out in phases over about a two week period. Due to the pandemic, Google Play is additionally experiencing delays in approving app releases of more than a week. For these reasons, it may take several weeks before a specific update becomes visible to you.