Leeroy is an app designed to manage updates for apps built by Jenkins CI.
Apps can integrate with Leeroy by exposing Jenkins-related meta-data in their AndroidManifest.xml.
Leeroy is incredibly experimental- expect bugs and incompleteness.
For gradle-based projects, integrating your app with Leeroy is as simple as adding the Leeroy-Gradle script to your project. Projects using Leeroy-Gradle will automatically expose necessary fields in their AndroidManifest.xml for integration with Leeroy upon being built by Jenkins. See the project page for more details.