Absolutely love this app. 4 out of 5 for two reasons. One, navigation, I think swiping between habits rather than scrolling would be a better interphase and also more intuitive. Scrolling habits only goes one direction, swiping could go both, as long as you're off the calendar. Two, the free version only can track five habits. I'll probably buy the app for full access, because this truly is a good app. However just a few more, say 10 instead of 5 in the free version would've been appreciated.