Option to choose what time the day ends
Instead of making the day end at midnight allow users to choose when the day ends.
For example, I'm a night owl, and frequently don't go to bed until 2AM. I have some activities I do from midnight to 2AM that I would like to track with the previous day.
In this case I would like my days to end/renew at 3AM.
I believe the productivity app and the daily goals app have this ability and it was very useful.

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Darran Edmundson commented
Sorry but I’m cancelling my 1-week trial exactly for this reason. I’m going to bed at 1am and Strides is making me log my flossing as yesterday?
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Anonymous commented
I used coach.me previously and this app defaults to yesterdays habits if the clock passes midninght. Its very handy.