I guess you're right. When I bought it I really needed it (I had been waking up people in Australia, Europe, and the U.S. far to often - added when I should have subtracted and vice versa. I was mortified by my arithmetical ineptitude. )

Since that was in 94, the cost is down to way less than $4.00 a year.

Seriously, I see that Fox Clocks continues to compute time differences when a browser is opened even if you are not on line. A good deal if it does what you need.