Meter is a data-driven wallpaper that displays the battery, wireless signal and notifications in a simple background visualization. It cycles through three visualizations and you can play with each wallpaper by tilting and moving the phone.
Meter comes with an application to enable a NotificationListenerService allowing the live wallpaper to listen to your notifications and displaying the third wallpaper.
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This is not an official Google product, but an Android Experiment.
