AutoHotkey Community

Let's say I wrote a piece of software and I want to give it out to someone, but I want to put a limit on how much time he or she can use that software.

As far as I know, there are three possible ways of calculating such limit:

1) By counting the calendar days since the first time the software was used - for example, a user can use this software during 20 days since the first time it was run;

2) By counting the number of times the software has been used - for example, a user can use this software only 30 times without any time frame; one session may last eternally long, and the time span from the first time till the 30th time is also unlimited;

3) By counting the actual running time - a user can use that software only, say, for 90 hours = 5400 minutes. The process of counting minutes will be disrupted every time the software is being closed, and resumed every time the software is started again;

Which way do you think is the best?
Do you think it is somehow possible to mix all three options in "whichever comes first" way or, perhaps, in a way of coming up with some formula that would bring all three to one "golden mean"? Do you have any ideas regarding this?

Mix of all would be best I think

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