Left: foot 足 (knee cap 口 and footprint 止), right: blossom 朵 (Image of a blossom 几 in a tree 木) If the foot leaves (on the floor) a 'blossom' (= imprint), you have stomped (stamped).
Radicals are shown here that are similar either in appearance or meaning.
The app has many other functions, such as character selection according to difficulty, practice programs, handwriting recognition and success statistics!
