Hi all,
I don't usually post in here, I'm a TTC regular. But I've just found this website via another website and thought it might be useful to some of you guys!
http://www.contractionmaster.com/
Basically when you have contraction you push the spacebar on your pc, then when it ends you push it again and so forth, and it times the space between each contraction and the duration of the contraction.
Hope it helps someone, I just had a little play and it looks quite good!