These are instructions how to change the default Mail app on your iPhone using iOS 14 or newer.
You may want to do this if you prefer using a mail application on your iPhone that isn't Apple Mail.
Step One Download a third party mail app from the App Store. Examples include Gmail, Microsoft Outlook, and Spark. We'll use the Gmail app for this tutorial.
Step Two Tap to launch Settings from your Springboard.
Step Three Select your new mail app from the Settings menu.
Step Four Tap Default Mail App.
Step Five Select your new browser from the list of available browsers to make it default.