The Everyday Calendar by Simone Giertz is the calendar you've been waiting for. Each day you get a gold star for whatever you're trying to achieve - daily meditation? Guitar practice? The world is your oyster.
The functionality can be easily copied in a digital format. There are more robust solutions in digital format present in the market : apps in the apple (Strike is an example) and android stores (habitbull for example).
It is a physical product and it is gonna be at your place of choice at all times
Quite expensive. There are free app equivalents in the market. Limited interface, just works for a single habit. Monocolor, not expandable.