Google announced today that its Cardboard VR app is now available in 100 countries for both iOS and Android. The company also stated that the app's software development kit has been improved. According to the Google Developer's Blog, the new SDK now features better drift control thanks to "a major overhaul of the sensor fusion algorithms that integrate the signals from the gyroscope and accelerometer." This should diminish the amount of "drift" wherein the displayed images continue to move even after your head has stopped turning.