Biojenic

This is the ONLY app that allows me to experiment with color and design for my crochet granny square based afghans. It's well thought out. I can add yarn color swatches. I am waiting with baited breath for the block designer. Then I'd be all set. I am too inexperienced with programming to take advantage of the concise instructions about programming my own blocks on the website. But if you can program the instructions are all there!