Create habits of any type and mark the dots every time you accomplish your task. That way you're able to see all of your activity date by date when gaining a habit. Every dot represents a date / timespan thus you can't mark a dot that was supposed to be marked in the past or future. You can see the dates by long pressing any dot on your screen. You can create your own themes for each habit and yes there is no limit at all. After a habit is completed, you can archive it.