Techniques for providing bio signal based mobile device applications are disclosed. In some embodiments, a system for bio signal based mobile device applications includes a bio signal sensor (e.g., biosensor) or multiple biosensors (e.g., multiple biosensors for EEG detection, or multiple biosensors that can each detect different types of bio signals), a bio signal processing unit, the mobile device, and a software application(s) that utilize the bio signal information for various applications (e.g., practical applications, entertainment applications, social networking applications, and/or other applications).本發明揭示用於提供基於生物訊號之行動裝置應用之技術。在某些實施例中,用於基於生物訊號之行動裝置應用之一系統包含:一生物訊號感測器(例如,生物感測器)或多個生物感測器(例如,用於腦電圖(EEG)偵測之多個生物感測器,或各者可偵測不同類型之生物訊號之多個生物感測器);一生物訊號處理單元;該行動裝置;及一(若干)軟體應用,其將該生物訊號資訊利用於多種應用(例如,實務應用、娛樂應用、社群網路連線應用及/或其他應用)。