The document is an Android app performance report from AVG Technologies that analyzes data from over 1 million Android users. Some of the key findings include: 1) Spotify has risen to the second most resource-intensive app overall, though its install base has declined. Amazon and selfie apps also impact battery life and data usage. 2) Popular games like FarmVille and Puzzle Dragons have seen major declines, while new games like Boom Beach have increased in usage and resource intensity. 3) Social media and communication apps have seen increased usage compared to gaming from Q3 to Q4 2014. 4) Automatic security updates from Samsung have led to battery life decreases of 30-40%