Introducing the smartphone app of the world’s first portable audio workstation, the “KDJ-ONE”! Compose a song in just 5 minutes on your smartphone device!

Compose your own music, or mix existing tracks and use it as your own personal “DJ Machine”. Utilize your imagination and ideas to create your own music as if you were in a professional studio. Boasting a selection of more than 200 preset tracks and over 400 instruments to choose from, you can compose your own music without a musical background. Create a short melody in 5 minutes, or use the mute function and song mode to mix and easily play music like a DJ.

◆Recommended For:◆
Beginners looking to create their own music!
People who want to create music on the go! On tour, vacation… and more!
People creating music for games and performances!
People who want to experience the hardware version of the KDJ-ONE!

Preset Samples: Over 200 tracks!
Preset Instruments & Sounds: Over 400 varieties!
Modes: Sequencer (Insert different instruments and sounds into your composition)
Synthesizer (Synthesize waveforms to form a timbre)
Sampler (Record and modify sounds from external audio inputs)
Song Mode (Arrange and playback your composition)

Japanese, English

iOS 10.0 or later

KDJ-ONE Official Site:

This app is based on the hardware version of the “KDJ-ONE” and may differ with regards to development and functions.

What’s New

Version 1.0.11

Following bugs are fixed on this version.
(1) On song mode, a placed clip data (wav,aiff) was ignored.
(2) Correcting some unexpected freeze.
(3) Sometimes, the keyboard button did not come back after a finger was released from the display panel.

Ratings and Reviews

4.6 out of 5
10 Ratings
10 Ratings
Thirdnail ,

I’m surprised more people have not found this synth charming!

I will be the first to say I’m skeptical when it comes to free apps that offer and all-in-one music 🎶 capabilities.
BUT this; this is a very-very nice, well thought out DAW ... I played with it for over an hour. There is some very pretty CHOIRS, there isn’t many ISO apps that offer inspiring Choirs.

Nice selection of drums, guitars, basses, winds, brass, vocals, ect. Nice easy pattern lay-out. Easy to use effects ... tons of them as well. From delay, chorus, reverb, filters, ect.

*** HOWEVER... I didn’t see any AUE or Inter-app Audio

If this gets added, WOW! But without them, this app will NEVER get a chance, or respect.

Btw... no ads popping up either this has some true potential.

Sean Fear ,

Cannot use midi keyboard.

When where will the hardware version be available? I tried both a nanokey wired with a lightning to usb cable and a nanokey studio via midi over bluetooth. Both theses keyboards work with all the other midi compatible apps. The in app midi settings seem to recognize that the nanokey studio has been set up however the select device button has no functionality. Otherwise pretty nice?

littlewoodg ,

Really fun and cool

Amazing that this is free, it’s deep and smart and crazy fun.
Now add .wav import/export in-device, (Files app), make it skinnable maybe, add some other iOS things, as IAPs even...


CyberStep, Inc.
86.5 MB

Requires iOS 10.0 or later. Compatible with iPhone 5s, iPhone 6, iPhone 6 Plus, iPhone 6s, iPhone 6s Plus, iPhone SE, iPhone 7, iPhone 7 Plus, iPhone 8, iPhone 8 Plus, iPhone X, iPhone XS, iPhone XS Max, iPhone XR, iPad Air, iPad Air Wi-Fi + Cellular, iPad mini 2, iPad mini 2 Wi-Fi + Cellular, iPad Air 2, iPad Air 2 Wi-Fi + Cellular, iPad mini 3, iPad mini 3 Wi-Fi + Cellular, iPad mini 4, iPad mini 4 Wi-Fi + Cellular, 12.9-inch iPad Pro, 12.9-inch iPad Pro Wi-Fi + Cellular, 9.7-inch iPad Pro, 9.7-inch iPad Pro Wi-Fi + Cellular, iPad (5th generation), iPad Wi-Fi + Cellular (5th generation), 12.9-inch iPad Pro (2nd generation), 12.9-inch iPad Pro Wi‑Fi + Cellular (2nd generation), 10.5-inch iPad Pro, 10.5-inch iPad Pro Wi‑Fi + Cellular, iPad (6th generation), iPad Wi-Fi + Cellular (6th generation), iPad Pro (11-inch), iPad Pro (11-inch) Wi-Fi + Cellular, iPad Pro (12.9-inch) (3rd generation), iPad Pro (12.9-inch) (3rd generation) Wi-Fi + Cellular, and iPod touch.



Age Rating
Rated 4+
© 2018 CyberStep, Inc.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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