title: restrict app to mobile
body: <p>I want to prevent a messaging app (ios &amp; android) being used via a device that does not have a sim card. This <a href="https://stackoverflow.com/questions/10142755/how-do-i-restrict-my-android-app-to-non-tablets">previous question</a> and <a href="https://stackoverflow.com/questions/14846609/restrict-app-installing-in-tablets">this one</a> both suggest the following might work for android, but I also need an ios equivalent : </p>
  
  <pre><code>&lt;uses-feature
  android:name="android.hardware.telephony"
  android:required="true"/&gt;  
  </code></pre>
  
  <p>Can such code to be copied to a tablet/desktop and then circumvented ? I am aware that wattsapp's mobile-only approach could be circumvented for use on a PC and I want to avoid such possibility.</p>