Is there any way to set Gmail app as the default mail client in iPhone and iPad?
I want to be able to one-click email links from apps such as Twitter, Safari and Instapaper. Is this possible if I'm using Gmail and not Apple's Mail app?
Do I have to set Gmail as the default mail client? Is this possible?
This is not possible on iOS 13 and lower. (Or iPadOS 13 or lower)
In order to utilize email functionalities from within apps, you will have to enable the Apple Mail app. I recommend turning off all notifications for Mail if you want to use the Gmail app as your primary iPhone mail client.
To give a very short answer: No, this is not possible.