Select All Unread Gmail App. On your iphone or ipad, open the gmail app. In the top right, tap unread.
It’ll follow the same rule every time you access gmail on the web. Launch shift, then open gmail inbox in question 2. Click on “see all settings.”.
Check the select all box to select unread mail.
This will select all of your emails. In gmail, unread emails include messages you haven't opened and messages you have opened but marked as unread. Then use the checkbox to choose the emails you want to select. 3] in the quick settings toolbar, select “ unread first ” under the inbox type section.