I have been using reptile scan (http://www.lpracks.com/reptile-scan.html) if you were using an iphone/ipod it would be worth looking at. The feature I love the most is the interactive data base that myself my wife and her child can enter data. So if I change all the water and go to work and she finds a poo we both can enter this information and it is all updated at once, and available via a web site. I would have a hard time going back to a single terminal system now.