They are still in development, and talking many things over. It is possible it will change to auto. But it's not hard to simply click a check mark...
Although, I wouldn't mind you being able to click the current date on the calander to bring up the calander (so you can mark the day) Or better yet, I would love to see the option to just click the date on the calander to recieve the attendance day.
And if you want to view how many days in a row you have, you can click the "more" tab and view it.