Odoo mobile app backend addons.
Branch master only contains appbox core module. If your want to install some config module for appbox, you can checkout the branch which name same as your odoo version series. eg: if your odoo version is 12.0 series, you can checkout the branch 12.0.
Google Play: https://play.google.com/store/apps/details?id=com.odooappbox
Direct Download: https://d.atknit.com/odooappbox.apk
App Store: https://apps.apple.com/us/app/odooappbox/id1465496744