Hiya, it doesn't matter what your device is or your operating system (OS). In your case, it's Android (I'm also using a Samsung Galaxy phone and tablet). What matters is you can't find it in the app.
There's three ways you can find it:
organized by skill in one pdf for the whole course: https://www.docdroid.net/JnfmyEV/tipsnotesbackup.pdf
Replace your username where mine is for information on your progress AND the tips and notes, etc: https://duome.eu/teribleteri/progress
Or by using the duolingo website, under each skill, once you click on the circle there's a lightbulb icon that has the tips and notes for each section. (the website works best in Desktop view) but your browser doesn't matter! The desktop view (only) also shows the searchable discussions in Duolingo, but it doesn't have the Hebrew (and other language) clubs that the app does. You can use either or both (website and app).
(if you haven't read, there's also a companion course: (All the words with audio) Hebrew Duolingo vocab on Memrise! http://www.memrise.com/course/1031737/