title: How to integrate Crashlytics with Sentry?
body: <p>Can you help us please with these great tools integration.
  Our React Native iOS project has been using Crashlytics for several months and it works well in case of <strong>native crashes</strong> but in case of <strong>JS exceptions</strong> it required some customization of react-native logging (<a href="https://medium.com/delivery-com-engineering/add-crashlytics-to-your-react-native-ios-app-69a983a9062a" rel="nofollow noreferrer">this Medium articles helped a lot to reach as verbose JS output as possible</a>). In the end we didn't have as good JS errors output as we would like to have.</p>
  
  <p>So we decided to integrate Sentry as well.
  It was done successfully, but it seems that Sentry <strong>outpaces</strong> Crashlytics catching crashes before it: we can see crashes in Sentry dashboard but no in Crashlytics' one.</p>
  
  <p>My question is the next: is it possible to integrate both Crashlytics and Sentry for both case - <strong>native crashes AND JS exceptions</strong>?</p>
  
  <p>Thank you in advance.</p>
  
  <p><strong>UPD 06.03.2019</strong>
  Finally, we've come to the usage of only Sentry because of the next reasons:</p>
  
  <ol>
  <li>first of all, it doesn't require any special code for the JS events &amp; errors well-formated output, whereas Crashlytics does;</li>
  <li>second, it doesn't require any manipulation with dSym files released (and probably encrypted) via Testflight;</li>
  <li>third, it also catches native crashes and provides a verbose output as well.</li>
  </ol>