A. 1. Update the app to the latest version via the App Store, as updates often include bug fixes. 2. Check for iOS updates by going to Settings > General > Software Update and install any available updates.
B. 1. Free up memory by closing other apps running in the background. 2. If the app continues to crash, consider resetting your iPhone's settings by going to Settings > General > Reset > Reset All Settings (this won't delete your data but will reset system settings).