Due to it being so simple to make, there are also tons of clones of the app on the app stores since there isn't actually an official app. I imagine a lot of people are actually playing those clones and not the website.
Are the clones solving the original each day so they can have the same target word?
The answers for each day (past and future) are hard coded in the javascript source and viewable in the client, so they are quite accessible for anyone that's interested