The Radical yongashira shows the picture of an eye with a central pupil ロ, whereas 'eye' is also: 目. This radical is sometimes seen as a net for fishing.
The Radical sajinohi means "spoon". But due to its appearance is typically used as a "sitting person". In few cases however, it is understood as claws (i.e. of a bear).
The app has many other functions, such as character selection according to difficulty, practice programs, handwriting recognition and success statistics!