Add tips & notes to mobile app
Just add the tips & notes. I hardly ever have access to a PC because I only have a phone. It would be such a good addition to the app.
When you do get access to a PC, try Copy and Paste from the tips and notes to a WP file. You may have to juggle with the formating a little but you will get the notes in a form you can read on your phone.
AFAIK, The tips and notes are available on Android devices and on the iPhone I can open up the web page, although I do have to switch to the full site which may not be available for phones with limited real estate.
Have a look at a similar question in this thread, and the answers of the CEO of Duolingo
Workaround for App users
The grammar "Tips and notes" are available in the desktop mode of the browser of your phone/tablet.
In the Firefox browser you can select the "Desktop mode" via the three dots in the upper right corner of the screen.
(Note: This may be not working on iOS phones with a small screen)