Installing the latest iOS version will likely solve the problem if it's caused by system issues in the older iOS version.
Here's how to quit and restart the MeteoEarth app on your iPhone:
Restarting the MeteoEarth app helps clear any minor glitches from the app's cache. Close and restart the MeteoEarth app on iPhone:.
How to Fix MeteoEarth app Crashes or Not Working on Iphone (iOS): We have compiled some helpful workarounds that should serve as free reference whenever you need to deal with an MeteoEarth app which keeps crashing or doesn't work as expected on your iPhone 13,12,10,8,7,6, SE,XS,XR. MeteoEarth on iOS has black/white screen.MeteoEarth iOS app crashes, not working, errors.Choose your MeteoEarth iPhone app Issues: