Top free Apps like Speaker Booster for Android
Speaker Booster Free
Turn your volume up to 11 with Speaker Booster
Speaker Booster manages your mobile's audio levels and increases them to produce a stronger sound.
The app divides your mobile's audio into three different categories: System, Media, and Notifications.
System handles the volume of your calls. Media takes care of games, videos, and music. Notifications are self-explanatory.
Unfortunately, it's a little too simplistic and you can't manage individual apps. Speaker Booster works very well and can be used with headphones or speakers.