Installation
Download the apps
Tap the store link of the app you want. On a computer, scan the code with your phone.
If you are entering the contest
Sign in to the app with the same email address you use for your account on this site. Matching happens through that address; if you use a different one, we cannot reach you even if you win.
If you do not have an account on the site, you need to sign up first. Using the app alone is not enough to enter.