title: iPhone App with Activation Key
body: <p>I am asked by a client to build an iPhone app which works as follow:</p>
  
  <ul>
  <li><p>User download the App for free from iTunes</p></li>
  <li><p>User enter their email address when they first launch the app</p></li>
  <li><p>They will be emailed activation key</p></li>
  <li><p>User launch app and then enter this activation key to start using the App.</p></li>
  </ul>
  
  <p>User do not have to pay for this activation key as the only purpose of this is that only employees of my client company can get the activation code and use it. So when they enter their email address activation key will only be sent if email address is from the same company.</p>
  
  <p>I know I can use enterprise license to distribute app internally but it is not possible due to various reasons.</p>
  
  <p>We do not want to their activation key every time so this will be stored in their settings.</p>
  
  <p>Second questions is that if I want to force them to enter their activation key every month then does this violate apple guidelines.</p>
  
  <p>I want to ask that if I build app as explained above then will it be rejected?</p>