IOS Apps with more than a 3 band equalizer?

My hearing aids are several years old and the setting cannot be changed without visiting an audiologist.
So I am in the market and the ability to make subtle changes at home is very appealing to me.
Many apps have treble and bass, some also have mid-range setting. That actually may be enough for me but am just curious are there apps that have more than 3 bands of eq to adjust?

Lots of them. Just search for “equalizer” in the App Store.

I am looking for “hearing aid apps” developed by the hearing aid manufacturers that have 3 or more bands of eq. I was just hoping for recommendations to avoid having to install every app to find out what features each one provides. Thanks.