App Crashes on Startup on Android

One possible cause is your Android phone has an old version of the Android Webview. Update this system app on your phone
https://play.google.com/store/apps/details?id=com.google.android.webview&hl=en_CA

It is also recommended to update Google Play Services https://play.google.com/store/apps/details?id=com.google.android.gms&hl=en_CA