I use 'My Days' and it's working really well. Tomorrow morning will be my 3rd temp reading so I haven't been doing it for very long at all. I have the alarm set on my phone for the same time, early every morning. It's hard to coordinate yourself enough to turn off the alarm, grab the thermometer and then enter the numbers into the app when you're that sleepy. Not to mention putting the thermometer back in its case afterwards. (I wash it when I'm more awake.)