An Android utility app that displays your unread GMail count in your notification bar and on your lockscreen.
Available for free download on Google Play
The inspiration for MailCircle came from the DashClock widget, which I'd relied upon for years to give me an at-a-glance unread count on my lock screen. Unfortunately, with Android 5.x the ability to put widgets on the lockscreen was removed, leaving me unread-count-less!
MailCircle was written for Android 5.x only (as those are the only devices I own), but it should be relatively easy to reduce the minimum SDK level to cover Android 4.3 - I just haven't tried it.
MailCircle is licensed under the GPLv2.