I currently use MapMyWalk as I do a lot of walking to monitor distance and calories used. I also add in activities like Pilates and yoga, and I like that when I'm pushing the pram it takes that into account and adds in the extra calories burned. The only issue I have is the amount of battery life it uses up on my iPhone - if I use it a few times in a day my battery usually dies by mid afternoon. Is there anything I can buy that will do the same thing? A pedometer wouldn't work because it wouldn't take hills or the pram into account - and I've read the wrist ones won't even work when pushing a pram as your arm isn't moving up and down? Any ideas? Thanks 