When I tried this dictionary's sample on kindle, I thought this was very simple & useful...So, I purchased it.But I can't set it "Primary Dictionary" of my kindle, and it doesn't have "search dictionary" function!If you intended to use it for your kindle dictionary, you might be disappointed.I wish this product page would have announced that "You CAN'T set this dictionary as your default Kindle dictionary".Of course, these review & rate are for "Kindle Edition".