HSK Stroke Order

Most stroke-order apps play you an animation and hope for the best. This one makes you write. Draw each stroke with your finger. It is accepted only if it starts in the right place, ends in the right place, stays close to the centre line, and comes at the right point in the sequence. Draw 一 from right to left and it fails — direction is half of what stroke order means. Draw a stroke that belongs later in the character and the app tells you which one it was.