A happy day! Desmos comes to Android and I now have the best handheld graphing calculator I have ever had! As you would expect of Desmos, it just works! Get it on Google play here. (Desmos iOS apps have been available for some time). I will certainly be asking students with Android phones to get the app.
You will find a series of Desmos Slideshows here, (these have been written with students in mind) and more on Desmos on this series of pages.
Photos by David Young