Why does my Yahoo App Keep Crashing? There can be varied causes due to which your Yahoo Mail keeps crashing on iPhone. A common reason is that you might be using an old version of the Yahoo Mail app. Yahoo app runs best on the latest version of the iOS software. If you're using an iOS beta version, then update to the latest official iOS released version. Then force stop and restart the app to refresh the active memory for the app. Visit for more detail https://contactforservice.com/yahoo-mail-keeps-crashing/