Neptune Kisekae! (ネプテューヌ きせかえっ！lit. Neptune Dress-Up) is a mobile customization app by Compile Heart only available on android devices. With Neptune Kisekae you can customize and change the entire theme of your android by downloading any of the Neptune Kisekae apps. When a Neptune Kisekae theme is in use, the App browsing and homescreen UI becomes changed along with the icons to a few default factory apps on your mobile device.
Each nation has it's own theme which features the CPUs, Candidates, and Oracles of each respective nation. In addition there is an app there is also a Friend Pack that features Plutia, Peashy, Compa, and IF as well as an Idol Pack starring all four of the CPUs. The Free Edition of the Neptune Kisekae Theme only has one image of all four CPUs and a Purple Heart lockscreen.