Why does my Yahoo App Keep Crashing? Yahoo mail app needs a certain amount of device memory to work with, and if your device is low on space or RAM, Yahoo mail keeps crashing on iPhone because of the lack of space. To fix this, delete unnecessary files on your iPhone device to free up disk space. Also, try to force stop the app and restart your device. Also, check whether reinstalling the app fixes the issue. Visit for more detail https://contactforservice.com/yahoo-mail-keeps-crashing/