I am trying to implement this function in my application, which will allow the user to use my application for free for only a few days, after which I will warn the user about the purchase of this application through IAP. for example, when I install some software for trail versions in windows, he has an evaluation period, and after the trial period expires, he asks to buy this software every time I install a new copy that the software should implement, for example, similar . a lot of google on this issue, but nothing works for me, and I also donβt know where to start. therefore, please, any body will help me in this matter. Thanks in advance.
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