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Editorial Team
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Asked: 2026-05-24T11:57:24+00:00

Any tips on how to implement a trialware model for Android apps? I plan

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Any tips on how to implement a trialware model for Android apps? I plan to release my app as a free app that expires after 30 days unless the user buys the license via an in-app purchase.

I can use the Android Market API to tell if they bought the license, so my main question is how to prevent the user from un-installing and re-installing my app every 30 days? Can I save something to their phone in a permanent and reliable way that will remain on the phone even if they uninstall? I know nothing will stop a determined hacker, I just want to stop the average user.

I am also open to different approaches to going trialware on Android.

Thanks in advance,

Barry

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1 Answer

  1. Editorial Team

    I would avoid leaving unwanted remains of the application on their phone.

    Instead, you can take some unique identifier of the device, and send it to your server, if this ID was not registered before, send it activation code, if it was, don’t send it.

    Store this activation code in some shared preferences etc. and when the application starts, check if the activation code is there and if it is valid.

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