Holo Notifier is a free companion app designed for Holo Launcher Plus and Holo Locker Plus users. It is a personalization app that adds notification badges to your app icons, making it easier to keep track of your unread notifications. This app is compatible only with Android 9.0 and above.

The app is simple to use and requires Holo Launcher Plus or Holo Locker Plus to work. Once installed, it automatically adds notification badges to your app icons, so you can easily see which apps have unread notifications. Holo Notifier also allows you to customize the color, position, and size of the notification badges to match your preferences.

Overall, Holo Notifier is a useful app for Holo Launcher Plus and Holo Locker Plus users who want to keep track of their notifications. It is easy to use, customizable, and free to download.