Amazon has today in the UK introduced its Amazon Music Unlimited subscription service, which was previously available only in the US. But for many of us this confuses things - what is the difference between Prime Music and Music Unlimited, and should you pay extra for the Music Unlimited subscription?

• Click here to sign up for a free Amazon Music Unlimited trial

• Click here to sign up for a free Amazon Prime trial (which includes Amazon Prime Music)

• Click here to see how to unsubscribe from Amazon Prime before your free trial expires

What’s the difference between Amazon Prime Music and Amazon Music Unlimited?

The key differences between Amazon Prime Music and Amazon Music Unlimited are pricing and subscriptions, and the number of songs available to you.

Cutting to the chase, to access Amazon Prime Music you must be an Amazon Prime member, for which you pay £79 per year. If you have no interest in subscribing to Amazon Prime or want more choice than what Amazon Prime Music offers then you can subscribe to Amazon Music Unlimited. As a Prime member it will cost you £7.99 per month or £79 per year; as a non-Prime member Amazon Music Unlimited costs £9.99 per month.

Whereas Amazon Prime Music offers two million songs, Amazon Music Unlimited has a much vaster library with 40 million songs in its catalogue. All are ad-free, available on-demand and for offline listening.

Two million songs is a lot, but when you consider just how many songs there are you may often find yourself feeling like listening to a song that isn’t available, particularly if your tastes aren't mainstream. Of course, it’s difficult to complain when Prime Music is merely a perk of Amazon Prime membership. There are plenty of other perks to paying £79 per year for Amazon Prime membership, which we have detailed in our complete guide to Amazon Prime.

Should I subscribe to Amazon Music Unlimited?

Those who already subscribe to Amazon Prime should pay extra for Amazon Music Unlimited only if they are unhappy with the current selection of music available to them, or if they are paying more for a secondary streaming service such as Spotfiy to fill the gap. At the cheaper price of £7.99 per month or £79 per year they could potentially save money with Music Unlimited.

If you do not already subscribe to Amazon Prime and have no interest in doing so, but would like to subscribe to a music-streaming service then Amazon Music Unlimited is a rival to offerings such as Spotify and Deezer. You can find out more about the alternatives available to you in our guide to the best music-streaming services.

Amazon Music Unlimited is also worth considering if you own an Amazon Echo or Echo Dot. You can access a cheaper Amazon Music Unlimited plan that’s available to those devices only for £3.99 per month (the full plan is available to all your devices, and a family plan is coming soon). To sign up on Echo or Dot, simply say “Alexa, try Amazon Music Unlimited.”