Apple Music, since I own an iPhone. It's already on my phone and the price is cheap enough. And it's the one that is available in my country But I tried out Spotify through VPN and it was...not my cup of tea, I guess.

Anyway, AM has more songs and they will be getting more and more exclusives. Also there's an interface change coming, hopefully it's good. Yeah, AM is not free but it's worth it.

As for lags and glitches, they are annoying, yes, but there are less and less of them with every iOS update.

In conclusion, AM is good, perfect if you have an iPhone, but if you have an Android phone, it's better to use Spotify.