Silly tablet doodle

I was dodling on my new tablet (a samsung galaxy note 8.0) using a program named sketchbookexpress (the free version) and decided to draw these two Tuonetar, Blood elf death knight and Velunna, a quel'dorei battle-mage
If someone know a decent program for drawing in android tell me please, sketchbook is decent, at least has layer options but I don't like how the lines come out, if you zoom too much the lines looks so rough and quite blurry