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Music-DL lets you download YouTube videos in mp3 and mp4 format.
The application searches for the song on YouTube by using the YouTube API. The YouTube url is then handed over to backend flask application which converts the video to mp3 or mp4 file and then returns the link to the file back to the application.
NonFreeDep: The application depends on a non-free application (e.g. Google Maps) - i.e. it requires it to be installed on the device, but does not include it.
NonFreeNet: This application promotes or entirely depends a non-Free network service.
Tracking: The application tracks and reports your activity to somewhere – usually either without your consent, or by default (i.e. you’d have to actively disable it). It’s commonly used for when developers obtain crash logs without the user’s consent, or when an app is useless without some kind of authentication.