Nope! You do not need separate accounts for each device! If you want to access Glo on your iPhone, Roku, and Android tablet, for example, you can.
To sign in to Glo across devices using the same account, use your email and password to sign into Glo. If you connected your account to Apple (Sign in with Apple) or Facebook, you will select this option on the login page.
If you can't get into your account for whatever reason, let us know! We'll find your login details for you.