I like the simplicity of the user interface. However, the features are *too* simple. It only allows you to indicate whether you did or didn’t do a habit on a given day. They should add a feature that would show that you voluntarily skipped a day.
For example, I’m trying to make a habit of opening my postal mail as soon as I come back from the mailbox. Habits will not allow me to indicate a day was skipped because the mail didn’t come.
Another example, I am trying to exercise Mondays through Saturdays but not Sundays, my day of rest. Habits will not allow me to show that Sundays or travel days were intentionally skipped. The record incorrectly looks like I failed those days.
I want to see at a glance my pattern without having to try to remember which days counted towards my goal and which didn’t.
Another feature that’s lacking is the inability to make notes about a given day. I’d like to be able to record why I didn’t do my habit so I can see if there’s a pattern, like sleeping too much is keeping me from doing my exercises.