Last month, Japan's Rohto Pharmaceutical released a collaboration between Hatsune Miku and their computer/smartphone eyestrain reducing Digi Eye drops. This included a package designed by Love, Chunibyo & Other Delusions illustrator Non (aka Nozomi Osaka) and Snow Miku 2014 designer Kihiro Yuzuki, along with a new song by Mitchie M. In the promotion's latest phase, a smartphone augmented reality app in which the Vocaloid performs on a product box top went online last weekend.
You can grab the app for free at:
iOS (Global): https://itunes.apple.com/app/dejiaiar/id893544146
Android (Japan-only): https://play.google.com/store/apps/details?id=jp.co.rohto.digieye
Then to use it, point your phone's camera at a Digi-Eye package, which will be used as Miku's stage. In case you don't have a box, Rohto provides a printable PDF that can be used in its place.