Overdoing the interface metaphor
Nearly everything about a real calculator is faithfully reproduced, but with the good comes the bad: nearly every limitation and frustration has also been reproduced. There’s very little reason to use the software facsimile over its real-world equivalent, and in some ways, the physical object is better.
Despite being faithfully designed to look and work like a real-world object, the Calculator app hasn’t made any progress. It hasn’t advanced technology. It hasn’t made anything more useful or created new interaction models.
