Despite mobile phones becoming the popular choice for playing music on-the-move, a standalone music player delivers a few differences that might make it more useful.
First things first, there's a fair chance they will deliver better sound quality. Then there's the fact that you don't have to use your phone, saving your smartphone's precious battery.
Many players now play hi-res audio, which is far from a given in the mobile market, and are likely to have more storage than your smartphone. Again, there's a knock-on effect for your phone in terms of freeing up storage space.
And if you want to get serious, the higher-end portable players can deliver good enough audio quality to double-up as the main music source in your home. So without further ado...