I know what you mean by dark year... there is one darkest week a few years ago where I just stopped functioning. My mind turned off, I barely had the energy to sit up from bed, I had gone hollow. Something had broken. It was so terrifying I decided to seek help, and after a long recovery, I made it.
Re: my app, I answered that question here: https://news.ycombinator.com/item?id=35754830