I use this App on my iPad, and I have my android phone, So I thought when the battery of my iPad drains and I put my IPad on charging then as a backup I'll use it on my Android phone but after purchasing on playstore and using it when I tried to import my .noteshelf file from ipad into this android version it says "unsupported". The Developer should have made it on one particular extension then it would have been really useful for me, worst part according to their policy I can't be Refunded. 😒