Where Android stands out, Leith said, is in the amount of data it collects. At startup, an Android device sends Google about 1MB of data, compared with iOS sending Apple around 42KB. When idle, Android sends roughly 1MB of data to Google every 12 hours, compared with iOS sending Apple about 52KB over the same period. In the US alone, Android collectively gathers about 1.3TB of data every 12 hours. During the same period, iOS collects about 5.8GB.