Expo Managed app works locally with RevenueCat, but crashes on launch in TestFlight

We’re using react version 18, and expo SDK version ~46.0.9. Not sure how to find useful logs from a build in Testflight - it doesn’t give an option to send crash feedback once it crashes. I also checked the iOS device logs and didn’t see anything in particular that looked related to the crash. Let me know if there’s any info I can attach to make this easier to understand;

@DougG  I have a question, can you still use ExpoGo when using "react-native-purchases"?  I was able to get offering and also do a purchase when building for TestFlight, but If I want to run my code in ExpoGo it explodes with an exception. I would like to keep using ExpoGo for testing other features (doesnt matter if I dont have access to IAP in ExpoGo). Any clue?

By the way I use the same command eas build --platform ios to build and publish to TestFlight and all works great.
 

For locally running development builds in Expo, I believe we can only get it running by using

eas build --profile development --platform android

and then running this command after the build is finished

expo start --dev-client

I’ve been able to use this to run the app on the iOS simulator and real device. On my side, everything works locally but the app it’s crashing on load in Testflight. Would love to hear any suggestions anyone has on what I can do to debug a build in TestFlight.

Hope this helps!

I’ve been able to use this to run the app on the iOS simulator and real device. On my side, everything works locally but the app it’s crashing on load in Testflight. Would love to hear any suggestions anyone has on what I can do to debug a build in TestFlight.

Running into a similar issue . 

Hi ​@whiletruelearn, if you are able to run RevenueCat debug logs here and send those for when you try to load your app in TestFlight that would be helpful. If you can also send over any errors in XCode or a stacktrace that would be great. Please let me know your SDK version too.

Regarding Expo, we have some documentation that might help:

https://www.revenuecat.com/docs/getting-started/installation/reactnative#option-2-using-expo

https://www.revenuecat.com/blog/engineering/expo-in-app-purchase-tutorial/

See our Apple testing guides here:

https://www.revenuecat.com/docs/test-and-launch/sandbox/apple-app-store

https://www.revenuecat.com/blog/engineering/the-ultimate-guide-to-subscription-testing-on-ios/

​@Haley Pace even after following the related guides, I got the same issue when I used the latest version of RevenueCat with Expo

I was able to figure it out. My problem was that the environment variable which was available in local was not available during EAS build. I had created an environment variable and that fixed the issue. ​@a0m0rajab , please check if that is your potential cause as well.

​@whiletruelearn thank you for mentioning that, my issue was due to using ‘app.config.js’ I think it’s missing some variables or something, I removed that and used ‘app.json’ at this moment. 

After further inspection, I realised that my app was not getting the .env variables like what ​@whiletruelearn mentioned. when I added my .env to .ignore the expo build did not read that file and ignored it. 

Few references to understand the issue: 

• https://www.reddit.com/r/expo/comments/1b7wn4y/local_eas_build_env_variables/
• https://docs.expo.dev/build-reference/easignore/
• https://docs.expo.dev/eas/environment-variables/