Facebook launched its new Home Android launcher a little over a week ago. So far the launcher has been downloaded over 500,000 times, which is a bit lean considering Facebook has billions of users. Granted Facebook Home only works on a handful of Android devices at this time.
Facebook Home launched in the US on April 12 and was available internationally on April 16. Clearly, a very small percentage of Facebook users has opted to try out the Facebook Home Android launcher. Another problem Facebook faces with Home is that most people are giving it a negative reviews. Over half of the reviews left on Google Play rate the Home launcher at only one star.
Currently, out of about 10,900 reviews for Home on Google Play, over 5600 of them give Home only one star. There is no way to know exactly how many people downloaded Home, gave it a bad rating, and immediately delete it from their phones. Just because the app has been downloaded over 500,000 times doesn't mean it has that many users.
As of April 19, the number of installs listed on Google Play was between 100,000 and 500,000. The number of downloads is now listed at between 500,000 and 1 million.