The Big Five Android app is available for testing. You are invited to join here: https://play.google.com/apps/testing/de.nitri.bigfive
The five scales used are: extraversion, agreeableness, conscientiousness, emotional stability and intellect/imagination.These were developed to measure the Big-Five factor markers reported in the following article: Goldberg, L. R. (1992). The development of markers for the Big-Five factor structure. Psychological Assessment, 4, 26-42.
Big Five web app: http://pygmalion.nitri.de/big-five-personality-test-989.html