Very Very funny after installation

After I had this app installed on my phone, I got an e-mail to the mail address of my phone that there has been a suspicion of fraud and unauthorized access to my Amazon account. All I thought was very funny, because it's not the first app I downloaded from Amazon and it has never been given such a mail. I've uninstalled the app again because I'm not quite so sure whether the app everything is okay. Better to be careful when installing. !!!!!!