Volume Booster 2019 is a free mobile application developed by Lame Game available on Android. This app is designed to improve the audio output of your device by adjusting the frequencies of your built-in Android eQ. The app aims to provide a better listening experience by making the audio louder and clearer. It uses the latest loudness module on devices running Android 4.3 and above, which is activated by the Boost button. For devices with older versions of Android, the app uses a slider instead.

To achieve the maximum results, it is recommended to use external speakers or headsets. The app also provides a sample ringtone for testing purposes. However, it is important to note that listening to music too loud can be harmful to your ears. Overall, Volume Booster 2019 is a simple app that can enhance the audio quality of your device and provide a better listening experience.