TeslaUnread provides counting unread badges for Nova Launcher first and WidgetLocker. It will not work with other offices or lockscreens.
Unread counts are natively supported for chat and email the most popular applications, such as Hangouts, WhatsApp and applications shown in the screenshot.
Also on Android 4.3 + TeslaUnread can watch the notification bar to extract the figures read from virtually any application.
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