Sony Mobile has updated the Sketch application moving it from build number 6.2.A.0.1 to version 6.2.A.0.4. The main new addition to this update is Facebook Messenger integration along with bug fixes. You will find the latest update in the Play Store, or you can download the APK below.
DOWNLOAD APK: Sketch (6.2.A.0.4)
Thanks ArshaaVarun and Rimaz!