Allan, I agree with @judi in the long-run it’s surely good to use both.
But… You know what? It doesn’t matter at the moment what I am thinking. There will always be different opinions.
Right now, what matters is your own opinion and what feels good for you in your guitar learning journey. That’s why I suggested, if you have the songs and lessons app, then start with it. Find out if you like it. Only you can decide that, because it’s your learning journey.
When you notice something is missing, then use the website in addition.
Hope that makes some sense? 