The problem Ko-Draw solves

We can easily use any paint application to draw whatever we want. But when it comes to painting with fellow mates together on a single canvas, Ko-Draw gives a fully-featured application to draw in realtime along with a brilliant version control system.

Challenges we ran into

The first challenge was to write the drawing app fully from scratch. Secondly, it was quite challenging to add different access modes to the user while sharing their paints. But we enjoyed the challenges.. :)