Is there any way to receive the installation date of an Android app? Or any other suggestions on how to accomplish a 30 day free trial version?
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I think this may be against the android market terms of service. You should probably check – Falmarri Oct 30 '10 at 22:41
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Just save the time when the application was first run. Then compare the time each time the program starts.
Another more secure way (the above tactic could be beaten by a simple reinstall) is to have a server of yours authenticate the imei number of the device the first time it's run and then continue the above method.
monoceres
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This already has a pretty good answer:
Creating an Android trial application that expires after a fixed time period
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Dave MacLean
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