Several adaptations of the Vocaloid 4 have been released. A Mobile version of the editor was released in 2015.
Another adaption of the software came in the form of ' Unity with Vocaloid', a version of the engine which allowed it to synthesis vocals in real-time within the Unity Engine. The job plug-in 'Vocalistener' also received an upgrade, with an upgrade offer for Vocaloid 3 version owners offered. Vocaloid 4 was the last version released under Hideki Kenmochi, as he announced his retirement on January 30, 2015.
In addition to the Vocaloid 4, the software itself also saw use in the Vocaloid Keyboard, which had first been announced in 2012, though prototypes of the Keyboard were finally unveiled in mid-2015 though did not see commercial release. There are a total of 10 vocals for this package, the first five, Native, Adult, Whisper, Sweet, and Power are updates on the old Vocaloid3 versions. The last five are new vocals and consist of Nativefat, MellowAdult, PowerFat, NaturalSweet, and SoftWhisper. Megpoid V4 was released as 'complete package' with all ten vocals, or as one of five separate packages with a pair of vocals in each. Native, containing the vocals 'Native' and 'NativeFat'.
