If you are looking for an app which you can use to improve the sound quality of your mobile phone, then the Equalizer app is best choice. For the audio and the video sound effect enhancement this app is a wonderful app. You can find an equalizer controller which helps you to manage the app effectively and create additional audio effects of your choice. There are different presets available for the people to choose from such as normal, classical, folk, dance, hip hop and so on. There are very many other features too in the app such as back up restore and so on which you need to understand in order to use the app.