I-Doser is an application for the playback of proprietary audio content. The developer claims the separately purchasable content aims to simulate specific mental states through the use of binaural beats, and much of it is named after prohibited recreational drugs. The I-Doser player has been downloaded more than a million times and is based on the audio technology of a GPL-licensed binaural beat generator, SBaGen. The player can be downloaded for free, but the audio content has to be purchased.
Research into the neurological technology behind I-Doser is sparse. Peer-reviewed studies exist suggesting that some specific binaural beat mixes can affect aspects of mental performance and mood, act as analgesic supplements or affect perceptions, but there have been no formal studies of any effects of mixes particular to I-Doser. Researchers from Oregon Health and Science University interviewed about I-Doser have expressed skepticism over its scientific basis, citing a four person controlled study of binaural beats that demonstrated no evidence of brainwave entrainment. Other universities have also stated skepticism.