Newly launched (August 2015), so not sure of what will be in there in the future. Likely to have UK focussed resources, developed by UK teachers. As such, the quality may vary - but it will be from multiple authors.
Android apps to support blooms taxonomy; all are content free, so can be used in multiple situations.
Kathy S. is American, so it's possible that some of the apps are only available in the US.