I have used App EQ's before and they do boost bass and volume but they don't boost sound quality. Any time you EQ over +-0 you are adding to the track.
MP3 files are 10% of the original. So if you want the best sound quality, FLAC for digital or Vinyl on line in or CrO2 / Metal cassettes. This will provide the best reproduction of what was on the original recording.
Remember, 1985 was the first year of digitally reproduced music. This was the first year the signal could be PUSHED onto the recording media (record, tape, CD). This is where LOUD music came from and also the first time the 808 was really pushed hard. But almost all the radio's we love were built to reproduce music from before this era. The engineers that designed them, did so to reproduce music before the digital PUSH and before the 808 note. The App EQ's might be tricking the radio into playing bigger bass, but IMHO, the sound quality isn't there.
In the end, it's all a matter of taste. As I said, I was using AnEq Free on my cell phone and it WILL push the bass but the sound quality was
However....If you are outside on the basketball court letting it all hang out with the volume on 8, it might be all you need to get your game on!
All a matter of taste