Android — Sound Normalizer

You need a (also called Volume Leveler or ReplayGain). Here is exactly how to get it working on your Android phone today. Option 1: The Built-in Trick (No App Needed) Many modern Android phones have a hidden "Loudness" or "Sound Normalization" feature, but it’s buried.

The Ultimate Guide to Sound Normalizers on Android: Fix Volume Spikes for Good sound normalizer android

Don't use a normalizer + a bass booster simultaneously. You'll get distortion. Pick one tool. TL;DR: Download Wavelet , enable "Auto Volume," and say goodbye to jumping for the volume button every 30 seconds. You need a (also called Volume Leveler or ReplayGain)