No need to stress how difficult it is to learn Chinese. No need to stress how overwhelmed a student will be when he is first presented thousands of seemingly enigmatic Chinese characters.
This app is trying to take all the stress away. It will treat the Chinese characters an unknown world waiting for the students to explore. How far and how fast a student can travel depends on how good her/his every step is.
Learn Chinese One By One will present only one character to the student every time. And the student can move on only when she/he goes over all of her/his unfamiliar characters.