Volume Booster and airpod Booster can enhance the volume of sound not only in headphones and earphones, but also it can make speaker louder. But for a better effect and better sounding we recommend you to use headphones and airpods. increase speaker and headphone loudness and the music volume of your mobile phone. It is a simple sound amplifier and music player booster that makes your phone extra louder. You can also use it during a voice call to increase the audio level so you can hear better.