Great! Very nice app. Further improvements  it would be great if: - We could properly visually navigate the tree of topics and videos. I tend to get lost. - We could keep track of what we watched in-app - The app kept its position accross starts  also within videos. - When navigating up through topics  the app would go back to the same position in a screen. - We can properly navigate (tree style) the downloaded videos. Hard to determine what to delete now.
August 13 2014