PS- The OpenVPN mobile app is called OpenVPN Connect (in the Google Play Store). You have to get the zipped cert file on your phone, unzip it and then import it. The is a drop down to import in that app. You can guide it to where you have those files.
When I download the zipped file, it unzips to be a .crt file. But the OpenVPN clients all want .ovpn files. What am I doing wrong?
EDIT: I realized the zip contains ALL the needed files after all.