Google Keep on an Android device now includes a simple drawing tool creating your own diagrams. I combine Google Keep with iChrome and in fact I took the notes at a conference with it. Notes can be free text or using check boxes like bullet points. I like the fact that you can export to google docs. All this whilst keeping an eye on my social media tools, weather, files and emails coming. Compact and handy for students to use of all abilities. Notes are automatically stored but sometimes if the note is left open you can accidently close it by accident. On a chromebook you can do all the above but not the new drawing element. Hope they do that on a future upgrade.