so you won't see the option to set a default in their settings. That's all you need to do — the selected app is now your default email app on the iPad. If you ever want to switch back to Mail ...

Apple has a contentious relationship with allowing users to choose default apps on iPhone and iPad ... system default apps for Email, Messaging, Calling, Call Filtering, your default browser ...

There are Default App settings for Email, Messaging, Calling, Call Filtering, Browser App, Passwords and Codes, and Keyboard apps. In the United States, you can use the Default App interface to ...