title: Difference between internal and external testers in iTunes Testflight beta testing?
body: <p>Can anyone please explain in complete details the difference between internal and external testers in <a href="https://developer.apple.com/testflight/" rel="noreferrer">iTunes Connect Testflight beta testing</a>? The difference here is just too brief. Does internal testers need to add UDID's of upto 10 devices? Or did apple completely removed UDID requirement now? </p>
  
  <p>Can someone please explain what needs to be done to distribute and test app of upto 1000 users? If I have the clients iTunes Connect credentials, how do I share the app from his own account? </p>
  
  <p>I know that there are too many questions asked in this thread which is against stackoverflow's policy, but i only need do's and don'ts of internal and external testing of this awful itunes connect <a href="https://developer.apple.com/library/prerelease/ios/documentation/LanguagesUtilities/Conceptual/iTunesConnect_Guide/Chapters/BetaTestingTheApp.html" rel="noreferrer">testflight beta testing</a>. </p>