You can get to them on your phone's web browser quite easily though. Just go to www.duolingo.com and sign in. I'm on the phone app right now, and have them open in my phone's browser. The tips for this lesson are at: https://www.duolingo.com/skill/gd/Family/tips-and-notes
Just find the lesson you want tips for on the tree. When you click on it to open it, you'll see two buttons instead of one: "Tips" and "Practice" Click "Tips" and rejoice and study!
I like to select the whole lesson and paste it into a file where I make annotations and further notes, so I have everything in one place for review.