People are not JUST on their phones. They are on digital devices of all kinds. Your church can use that to your advantage by placing sign-up links in places such as your church website, an email you send out, or a church Facebook have you have. These opt-in web widgets mean that folks can join your PastorsLine contact list from virtually any digital device.
At your request, web widgets have more customization options, including the call-to-action button.
All the info is here: https://help.pastorsline.com/en/articles/5641875-v3-web-widget-set-up