We just released an update to the Replicate app for iOS and Android that includes the Christian Standard Bible (CSB). To change over to it as your default translation, go to Settings > Default Bible Translation. Be sure to hit the Save button afterwards (or it won’t save).
You can also change from any screen with the Bible pulled up, but this won’t affect your default choice, though.
To update on iOS, please vis it the App Store. On Android, no update is needed. If you’ve never downloaded the app, head over to ReplicateApp.com