djay is a digital music mixing software program for Mac OS X, Microsoft Windows,[1] iPad, iPhone, and iPod Touch created by the German company algoriddim.

It allows playback and mixing of digital audio files with a user interface that tries to simulate the concept of "two turntables and a microphone" on a computer.

Automix mode enables djay to automatically mix songs from the iTunes library, and play them instantaneously with DJ-style transitions.

djay's instantaneous beat and tempo detection allows the user to match the BPM of two songs for a transition.

djay consists of a 3-band equalizers, gain, line faders, and a crossfader that provide the user with the necessary tools needed for a DJ setup to seamlessly blend one song into another.

[6] djay allows the user to preview and prepare the next song through headphones before playing it on the main speakers by simply connecting a USB audio interface or splitter cable.

In addition, djay features a MIDI learn system allowing users to configure and map any controller to their preference.