For two days, Amazon Music has offered a free three-month trial period of its Unlimited plan. This operation is valid until July 21 inclusive.
In Unlimited we have, as elsewhere, a local song download function for offline listening, no ads and Alexa integration (also from the app). Amazon Music Unlimited probably does not have much interest when you are already with any of its competitors. But because of the duration of the test, if you are not yet subscribed anywhere, this is the opportunity to use it all summer without a purse.