Hi Ladies, I found this website listed as a resource for sleep tracking in my copy of Healthy Sleep Habits... It looks like you can use it to keep track of all sorts of things - which was such a big task when you're sleep deprived!
When you sign up, they give you 14 days of their premium service, and convert you to their free basic service at the end - there's no credit card required to sign up. I don't know what the difference is, but I think I saw that the premium service was only $4 per month.
I know how valuable it was for me to track my girls sleep early on, and I truly think it helped us to reach that holy grail of 12 hours of uninterrupted sleep by the time they were 3 months adjusted.
Hope this helps!
www.trixietracker.com