the Internet via natural language voice commands. Google Glass received criticism over privacy and safety concerns. On 15 January 2015, Google announced that it would stop producing the Google Glass prototype but would continue to develop the product. According to Google, Project Glass was ready to "graduate" from Google X, the experimental phase of the project. Thync, a headset launched in 2014, is a wearable that stimulates the brain with mild electrical pulses, causing the wearer to feel energized or calm based on input into a phone app. The device is attached to the temple and to the back of the neck with an adhesive strip. Macrotellect launched two portable brainwave (EEG) sensing devices, BrainLink Pro and BrainLink Lite in 2014, which allows families and meditation students to enhance the mental fitness and stress relief with 20+ brain fitness enhancement Apps on Apple and Android App Stores. In January 2015, Intel announced the sub-miniature Intel Curie for wearable applications, based on its Intel Quark platform. As small as a button, it features a six-axis accelerometer, a DSP sensor hub, a Bluetooth LE unit, and a battery charge controller. It was scheduled to ship in the second half of the year. On 24 April 2015, Apple released their take on the smartwatch, known as the Apple Watch. The Apple Watch features a touchscreen, many applications, and a heart-rate sensor. Some advanced VR headsets require the user to wear a desktop-sized computer as a backpack to enable them to move around freely. Commercialization The commercialization of general-purpose wearable computers, as led by companies such as Xybernaut, CDI and ViA, Inc. has thus far been met with limited success. Publicly traded Xybernaut tried forging alliances with companies such as IBM and Sony in order to make wearable computing widely available, and managed to get their equipment seen on such shows as The X-Files, but in 2005 their stock was delisted and the company filed for Chapter 11 bankruptcy protection amid financial scandal and federal investigation. Xybernaut emerged from bankruptcy protection in January, 2007. ViA, Inc. filed for bankruptcy in 2001 and subsequently ceased operations. In 1998, Seiko marketed the Ruputer, a computer in a (fairly large) wristwatch, to mediocre returns. In 2001, IBM developed and publicly displayed two prototypes for a wristwatch computer running Linux. The last message about them dates to 2004, saying the device would cost about $250, but it is