LemmeKnow

It's not just a feature, he's a bug.

Downloads

The LemmeKnow Android app is available on the Google Play Store. The desktop hub and standalone utilities are available below.

Backdrop shows an alert over the lock screen in a translucent window, on top of your theme's texture or an image you pick. Install it in LemmeKnow under Settings > Install Plugin Package, then choose it in a rule's Delivery step. Plugins and Delivery screens are Premium.