Do I have to sign in to use the Lifetime app? No, you don't have to sign in to use the Lifetime app. There will always be lots to watch for viewers who don't sign in. Related articles Can I use the Lifetime app if my TV provider doesn't support it? What's the difference between watching while signed in and watching while not signed in? Where do I get my TV provider information? What is the Lifetime app? I am trying to log into my profile, but it isn’t working. What do I do?