title: How to have a paid and free version of iOS app share FB App ID?
body: <p>I have a free and a paid version of the same iPhone app. I would like for them to share a Facebook App ID since they are essentially the same app. I thought I could accomplish this by using this method from the Facebook class.</p>
  
  <pre><code>- (void)authorize:(NSArray *)permissions localAppId:(NSString *)localAppId
  </code></pre>
  
  <p>However, login always fails for one of the apps (in my case the free version) and it would seem that the reason is that the Facebook app created in the web interface asks for an App Bundle ID and App Store ID. Obviously the free version and paid version of my apps cannot have the same bundle id or app id so how can I make this work?</p>
  
  <p>The docs in Facebook.m suggest that it is possible with the authorize method I mention above:</p>
  
  <pre><code>/*
   * ...
   * @param localAppId
   *            This is useful if your have multiple iOS applications that
   *            share a single Facebook application id (for example, if you
   *            have a free and a paid version on the same app) and you want
   *            to use SSO with both apps. 
   * ...
   */
  </code></pre>
  
  <p>Thanks.
  - Alex</p>