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    <p>Not without modifying the kernel, or reducing the user priviledges on the device. Think of it as a Linux computer, where the cell phone user has root.</p> <p>Can you prevent them from removing your app? No.</p> <p>But you <em>can</em> make it painful and difficult enough that it's not worth it, and include alerts that indicate it has been removed.</p> <p>First, I would modify the software so it requests and successfully answers a cryptographic challenge/response periodically from a remote server - daily should be enough, and wouldn't impact battery use. This way your server knows when it has been disabled (could be sold as an additional $10/yr service charge) and you can alert the purchaser.</p> <p>Second, I would tie the software into the system at the driver level so that removal also removes text services. There are drivers or services that the texting application uses that could be replaced with your custom versions, and on removal would render the texting app useless. Chances are good that you already tie into the system in a similar way to block the texting app (and other apps) while traveling too fast.</p> <p>Third, I would consider installing a monitoring program that runs as a separate process (check out how the latest viruses operate for clues). It would check to make sure that not only is the app still running, but it's running the latest version, and there isn't a GPS simulator or other program that prevents your app from getting correct GPS data.</p> <p>I'm curious how you differentiate between the driver texting and a friend in the passenger seat texting on the driver's cell, though.</p> <p>-Adam</p>
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    1. POIs there any way to prevent an Android app from being removed?
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    1. COWow, thanks for the very thorough reply. Having the app install another app that watches for uninstall might be feasible, but also might be draining on the battery depending on how it worked; I'd have to look into it a bit. As for differentiating passengers, see http://www.textecution.com/faqs.php.
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      1. USJarett Millard
    2. COYou wouldn't need the side program running all the time - in fact it might be harder to notice if it isn't running constantly. Run it periodically, and on startup to see if it's still in cron (or similar) and installed. You might also be able to attach it to charging or other events.
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