York Logcat is a free tool for Android developers to monitor logs on their Android devices. It is compatible with Android 9.0 and works with a plugin that needs to be installed on Android Studio. The plugin can be downloaded from the JetBrains plugin repository.

As this tool is still under development, it has limited features. In the current version, you can only see the process name of the app which is logging in to the log file. You need to connect your device to Android Studio over adb to use it.

Overall, York Logcat is a useful tool for developers who need to monitor logs on their Android devices. However, it is essential to keep in mind that it is still under development and has limited features in its current version.