Hello there 
There is something with the app that make it crash randomly on standalone. I have a couple of users that reported it, and now I submitted a new version to the app Store and they rejected saying that the app crashed.
It’s a meditation app, and the crash seems to happen when users try to play a session (audio file). Also sometimes happened after several seconds that the audio had been played. For the player I am using:
import {Audio, Video, KeepAwake} from 'expo';
This is a crashlog reported by Apple:
Any help will be very appreciated 