Board Thread:News and Announcements/@comment-216.186.132.194-20150827205849/@comment-30602727-20150902185406

http://i.imgur.com/i7vOB3X.png

"According to this PDF, Unity-chan will be usable in V4, Mobile VOCALOID Editor, and the runtime version (which is available for free). Though, Mobile Vocaloid Library is still being considered. According to this, she will be sold for V4, etc, but for Unity's runtime she will be free (makes more sense tbh):
 * 製品版 UNITY-CHAN! 歌声ライブラリ
 * SDK 公開後に販売開始予定
 * PC 向けライブラリ
 * ダウンロード販売：ヤマハ公式サイトにて
 * ボカロネット内・VOCALOID SHOP

https://net.vocaloid.com
 * パッケージ販売：(検討中)
 * iOS 向けライブラリ
 * Mobile VOCALOID Editor アプリ内課金にて販売

The sound development kit you need to use Unity-chan or w/e is planned to release in December for Windows, OSX and iOS platforms.

Personally, I'm assuming it'll end up being something like this (V4 -> Mobile)" - VocaloidOtaku (Uchuu's comment)

It seems she is receiving a regular release too?