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Old 10-25-2009, 12:27 AM   #1 (permalink)
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When I ever release a shareware app, what's a good way to protect from someone installing & using it for the trial period and then uninstalling and reinstalling it?

How can I mark the ORIGINAL install date? If all data added by an app is removed when the app is deleted, how does the app know it was previously installed?

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Old 10-25-2009, 08:32 AM   #2 (permalink)
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We store this entitlement data server-side, keyed by the unique device ID.

However, you can probably store this info on the device. As long as it is stored in a standard class in the persistent store, it will stay on the device until erased, even if the customer uninstalls your app.
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Old 12-08-2009, 10:46 AM   #3 (permalink)
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Exactly... We store the install date in the persistent store in a standard object so that is stays there even if you uninstall the app. Has worked well for us so far.
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