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I’m creating a shareware program that I want to quit working 10 days after it is run for the first time. I have set up the program so that it creates a dictionary and writes the date to a file in the NSDate format the first time the program is run.

My question is:

Is there an easy way to compare the date the program was run for the first time to the current date?

See NSDate docs for the - (NSTimeInterval)timeIntervalSinceNow method.