I really love this idea. Simple logs for your projects. However, I struggle to see why I would use yet another tool. I can do this in OneNote or Evernote. ?makers How do you see the advantages of this over simple note-taking apps?
Also, I could see a use for a general logging app. Not just projects, but logging your life. That would cover this use case and others. Then, it's not just another tool, but a tool integrated into your life.