POWfolio continues strong Global ranking for books/free category.
It is a top 100 app in 6 countries as of May 31st:
United States, Slovenia, Finland (new listing to the ranking at #32 for that country), UAE, Qatar, and Columbia (new listing to the ranking at #93 for that country).
POWfolio is only available in iOS, so people should really consider it's impact and downloads/usage potential once Android arrives (very very soon, just a few minor details to finish up and it will be out on beta)
good day, docg