If/when officially released, Gmailer might be sold at a price of $0.99
Before installing, please install the Gmail app from the App Store, configure it with your email accounts and make sure that push notifications for it are working.
If push notifications for the Gmail App are not working, then Gmailer will not work, either.
DESCRIPTION
Automatically fetch mail in the stock iOS Mail App for Gmail accounts when a push notification is received for the Gmail app. This will happen 10-20 seconds after the push notification.
INFO
KNOWN ISSUES
If Gmailer is working when all items are enabled in 'Settings -> Notifications -> Gmail' but is NOT working when those items are disabled, turn on the option for 'Gmail App Notification Fix'.
It will enable most of those items but block notifications from the Gmail app so you don't see or hear them.
Manual changes made to 'Settings -> Notifications -> Gmail' will not be saved while this option is enabled.