Buyer Beware!

You should read the full story here and especially the part about the differences between how Apple selects its Apps as compared to how Google chooses theirs; the Google ones are checked for malware content and that's the full extent of Google's checking - they don't investigate it to see if it will actually do anything at all. Isn't that wonderful? So be careful. Be very careful. As they suggest here, read the product reviews first.