Its helpful to keep track of naps for the current day, but useless looking back at past days. You cant edit naps over a day old or reset everything so if you forget to turn a nap off or dont use it for a day, all your data is completely messed up and useless. The only way to view old naps is on a graph that you cant zoom in on which makes it difficult to see exact times. I dont know why they wont let you scroll thru/edit old data.
thoughto about Sprout Baby Sleep Tracker