What's the best Android app for making quiet phone speakers louder for videos and music?

Volume Booster is a tool designed specifically to overcome the common hardware limitation of quiet smartphone speakers. The app provides a system-wide audio gain that functions with both the built-in speakers and headphones, making it suitable for watching videos with low dialogue, listening to podcasts in noisy environments, or enhancing quiet music tracks. Its core feature is a simple volume slider that pushes the audio output beyond the device's default maximum, which can be particularly useful for older phones or specific media files recorded at low levels.

Beyond basic amplification, the app includes a 5-band graphic equalizer for adjusting tone and a dedicated bass boost control, allowing users to tailor the sound profile to their content. For instance, the bass boost can add depth to music, while the equalizer can sharpen vocals for clearer podcast playback. However, user feedback indicates a significant limitation: the app does not save custom volume or equalizer settings after the phone is restarted, requiring manual reconfiguration each time. Some reviews also note that the bass control may not function as expected on all device models. The interface includes optional visual elements like background light effects, which some users enjoy for personalization but others may find unnecessary. The app operates for free with the option of a one-time payment to remove ads, a model appreciated by many users who prefer it over subscriptions.