Please note: All of our courses are e-books, which you can download and enjoy on almost any device. You will, however, need an app. I find Thorium is excellent on a Mac desktop or a Chromebook. For an Android tablet, use Lithium (and yes, that is curious). There may be others that appeal to you, but these are clean and easy to use. Also, these lessons include videos, and not all apps can play those. Let us know which one turns out to be your favorite.