The MobileOffice app (for Genesys Cloud) is available in the regular Android and Apple appstores. Search for 'mobile office purecloud', or use one of the direct links below.
Note: you need a valid subscription for MobileOffice, in order to use/login into the application
Appstore URL

MobileOffice for Genesys Engage or PureConnect
For Genesys Engage or PureConnect, specific builds will be created by our Professional Services (these are not distributed via the public appstore).