Bass Booster Volume Boost EQ 4+

I was looking for a simple graphic EQ app that would allow me to tweak the EQ settings to accommodate the tonal characteristics of several different sets of headphones that I have (as different models of HP’s and earbuds have their own inherent sonic characteristics, that can vary from just slightly to significant) while listening to MP3 and WAV files that I have stored on my iPhone (12), and I found that this app works well in allowing me to dial in custom EQ curves for each pair of phones/buds that I have.
The app was free (or at least the version I installed is the free version), and so far, after listening to music for over half an hour, my listening hasn’t been interrupted even once by any pesky adds or pop-ups, and that’s a pretty rare thing when using free apps.
I rated this app only 4 stars, not because I’m unhappy with the app’s overall function or sound quality, but only because there’s no way to save different EQ settings for each of the different sets of phones/earbuds I have…
but, I also admit that I’m being pretty picky in my expectations, too, considering that the app is totally free. ;)

I have over 20 music folders on my phone in files that are basically playlists , but I could not import these folders into this app . The app wants me to import songs, and that is ok, but when you import songs from your phone onto the app and you have over 2,000 songs it is burdensome to try and recreate a playlist again….especially when the songs you import from your phone don’t have specific titles and names. This app offered almost everything I wanted except for that. I wanted to increase the volume in my sony 720s, and it did that perfectly. However, I can’t use the app if I can’t import playlists or music folders. I just can’t import each song individually. And let’s consider I do import each song individually. I can’t even hide the songs from the “songs” list on this app, and this means if I import 50 songs and create a playlist on this app, then when I want to create a new playlist with 20 more songs those 20 songs are added to the previous 50, and so on. So therefore it’s now 70 songs I have to filter through to make a playlist. Then as I add 20 more songs, you can get the picture. It be becomes ridiculously burdensome to song for song try and create multiple playlists, when the songs you import all stay on the same file. The best solution would have been that after you create a playlist using this app, that you can then go to the songs file and delete the songs from that file while maintaining the songs in the playlist.

This is only true free volume boost and bass boost I can find. Working with the new QC2 earbuds. Gives a nice bass boost to my rock music. Only 4 stars due to my opinion. Let’s me access my Apple Music. However, I can’t create playlists through this app unless I put my music dedicated solely to the app. So I can’t play my workout, lawn work, house work playlists.
So in will have 2 sets of music on my phone. I don’t do Apple Music subscription.
I see that being a problem for those users as well. All in all good app. You just have to find your own workaround.