Swapnote, or Itsuno ma ni Koukan Nikki in Japan (Nintendo Letterbox in the EU, Nintendo Mailbox in some other areas) is a free messaging app on the Nintendo 3DS released in late December of 2011. Unlike other messaging apps that let you give small blurbs of text, you essentially send scribbled notepad messages which are "redrawn" to the recipients, and even have the ability to draw in 3D along with attaching 3D pictures or sound bites. These messages can be sent to friends online via SpotPass or person-to-person StreetPass.