LG QCircle SDK Overview


The LG Quick Circle case is a folio phone case for LG smart phones. LG QCircle SDK is a software development kit that allows the creation of apps compatible with the Quick Circle case. The LG QCircle SDK provides a set of open APIs that allows developers to make the best use out of UX features of the Quick Circle case. Developers can make their apps directly accessible from and act accordingly with the cover.


LG QCircle SDK consists of the following components:

  • Library: Open APIs that provide Quick Circle features
  • Documentation: LG QCircle SDK developer guide
  • Sample Apps: Simple examples using LG QCircle APIs

Key Features

For Apps

LG QCircle SDK provides APIs; from creating app layouts to handling cover events.

The library provides various APIs for creating circle layouts, adding UI components and connecting to other activities when the cover is opened.




For Widgets

The QCircle SDK provides a guide on how to add a clock widget to Quick Circle clock.

Developers want to develop a custom clock widget for the Quick Circle using Android APIs. The clock widget can be set as one of default Quick Circle clocks by following the guide.

Supported Devices

The LG QCircle SDK works on Android 4.4 or later.

The currently supported LG smart phone models are:

  • LG G4
  • LG G3 series
  • LG G Flex 2