05
Apr
knock2plus

When it comes to getting various notifications while your device's display is off, a built-in LED is useful. However, it's far from perfect. Sure, you can customize each notification with something like Light Flow, but that doesn't let you know the message contents at a glance. And, of course, there are also devices that don't have an LED at all, like the Nexus 7 for example. If you're looking for more out of your notification experience, Knock²+ may be the answer.