Ever since a tragic (and avoidable) pilates accident robbed me of my hearing, I've found the only way to enjoy music is to take a 9 oz coffee mug, fill it with lukewarm WD30, and put it next to the speaker. I then dip my pinky in the oil, which transfers the vibration and allows me to "hear" the music.
That's how I listen these days.
I use a modded apk of Spotify so I can use it for free without the restrictions that the offical free app has. The only thing it lacks is the ability to download music or set the audio quality to high or very high tho, which is not really a problem since the quality between normal and very high is rarely noticeable.