Have learned 100/1000 Chinese characters using mnemonics and memory palace techniques :). Apps I'm using to do this: Tofu Learn to write the characters and Du Chinese as a graded reader.
@liztai Never got a grasp on memory palace techniques but I learned a few characters by flipping through a book meant for teaching Chinese to children by sorta "seeing" the things some of the characters represent...I definitely want to learn the language so I might as well pick up those techniques as I go about it :D