Apple's music app has a built-in equalizer setting on iPhone and iPad. You can use these EQ settings whether you are an Apple Music subscriber, you buy songs from iTunes, or you listen to music files you've uploaded manually.
While unfortunately there is no option to set up your own EQ configuration, Apple offers many different presets. Regardless of whether you want to get an extra base raise or if you want to hear the song for your favorite song a little clearer, there should be an EQ for each taste. It is strange that these are not visible in the Music app itself but not save.
How to select an EQ preset for the music app
To get started, open the Settings app and scroll down to "Music" before pressing it.
Next, scroll down and then press "EQ".
Here is a list of presets that all make your music sound a little different depending on what settings Apple used when they were created. To select an EQ, press it.
iOS 12.1.4 are the available options Acoustic, Bass Amplifier, Bass Reducer, Classic, Dance, Depth, Electronic, Flat, Hip Hop, Jazz, Senate, Latin, Loudness
Again, It is worth remembering that this option only affects music played through the music app. Songs from Apple Music and music downloaded or purchased via iTunes are good, but Spotify, Tidal and other services are not.
If you want to use an equalizer with other services, look for a software EQ option in the service app. If the app does not have its own equalization option, you cannot enable EQ for music played through that app.