First of all, I would like to thanks for making expo.io. it really makes us productive to build great apps.
I have just build my first production ready app and uploaded it to beta testing, Facing some issues that is critical for prod release help will greatly appreciated.
SDK Version: 18.0.0
App size is 45 MB for 10 screen app (ipa size 140MB).
When started in both iPhone 5S and 6S the app shows 3-4 seconds white screen.
Link to video: https://goo.gl/photos/caH6iDKVQHvJBNao7