Microsoft continues to release new Windows 10 preview builds to Insiders at a steady clip, the newest of which is build 15055 for both PC and mobile. As we approach the release of the forthcoming Creators Update, these preview builds bring less to the table in terms of major new features and upgrades, and are more focused on crushing bugs

Source: Hot Hardware – Windows 10 Creators Update Nears Finish Line With Insider Preview Build 15055