When comparing Wickr vs Amazon Music Unlimited, the Slant community recommends Amazon Music Unlimited for most people. In the question“What are the best lossless music streaming services?” Amazon Music Unlimited is ranked 4th while Wickr is ranked 5th. The most important reason people chose Amazon Music Unlimited is:
Purchased music can be downloaded and transfered to other music players/file storage devices.
Specs
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Pros
Pro Doesn't require a phone number
Unlike most, you can use your phone but you don't have to. You can register without giving anything and add contacts either via e-mail (only) or phone number.
Pro Content shredder
Wickr has a feature that not only erases all messages, but also overwrites them with junk data.
Pro Can find other users securely
Instead of using usernames, emails or phone numbers to find other users, Wickr uses hashes derived from phone numbers or email addresses (this applies to the find friends functionality only). Hashes are the result of a one-way cryptographic function, meaning it's purposefully difficult to reconstruct original data (phone numbers and email addresses in this case) from them. For Wickr, hashes are generated on the client's side so that no personal information is ever sent to the Wickr servers. The app finds people on your contact list that also use Wickr by comparing the hashes that get generated from contacts and comparing them to the hashes that are stored on Wickr servers.
Pro Group messaging
Pro Messages have user-defined lifespan
Messages can have a lifespan between 3 seconds and 6 days. Received messages arrive locked. Once they are opened by the recipient, a timer starts counting down until the message is deleted. Of course, the recipient can still copy them or take a screenshot.
Pro By default, doesn't allow taking screenshots
Wickr disables the screenshot functionality altogether when the app is open. However, there are ways to circumvent this, as if the user has a rooted phone and has installed apps to overide this block or if a screenshot is taken via some apps that project the screen to a PC.
Pro Includes a basic photo editor
The editor allows cropping images, drawing and writing text on them as well as add decorations.
Pro Possible to transfer purchased music between devices with no limitations
Purchased music can be downloaded and transfered to other music players/file storage devices.
Pro Discount for prime customers
Prime customers get a discount on the service.
Pro Great web app
This service's web app works really well.
Pro Supports uploading custom tracks
Upload your own music files with the option to buy more storage if you have more than the limit.
Pro Great recommendations
The built-in recommendations feature is great, since it uses both content purchased from Amazon and streamed music to calculate new suggestions.
Pro Mobile applications available
Mobile applications for Android and iOS.
Pro Desktop client
Desktop client for Mac and Windows.
Cons
Con Partially Open source
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Con Small user base
Wickr claims that one million users have downloaded the app with no information on how many active users they have. But even if every person that has downloaded the app is an active user, the userbase is really small compared to apps like WhatsApp that boast about hundreds of millions of active users.
Con Android App frequently crashes
The Android App for Amazon Music crashes frequently, especially when you leave it in the background.
Con Rips artists off
Amazon pays artists even less than Spotify! Per count, as of march 2018 Amazon paid $0.0040, Spotify $0.0044, Apple Music $0.0074 and Tidal $0.0125.
Con Clunky desktop app
This service's desktop app is clunky and nowhere near as nice as its web client.