Substratum K-Manager is a personalization app developed by KpChuck for Android devices. It allows you to build the substratum module, K-Klock, on-the-go, giving you the ability to customize your status bar clock and more. With K-Manager, you can easily change your status bar clock position, choose whether the clock displays on the lock screen, and change the clock color, font, and size. Additionally, you can customize your status bar by changing the background color, adding custom icons, moving status bar icons to the other side, and much more.

K-Manager also includes additional features such as enabling rounded recents, adding custom text to the status bar, and customizing the Quick Settings tiles. The app is compatible with all ROMs and phones and even features an APK decompiler. To use K-Manager, simply open the app, grant it permissions, change the settings as per your preference, and press the yellow "Build" button to start building K-Klock. Once K-Klock is built and installed, open it in Substratum and pick the options you want. Overall, K-Manager is an excellent app for personalizing your Android device's status bar clock and more.