BackgroundDownload is a set of Unity plugins to download files in the background on Android, iOS and Universal Windows Platform. Using these plugins you can start a downloads of large files and these download will continue even if application goes into background or gets killed by Operating System. The results can be collected next time you launch application. Limitations: Only files can be downloaded and they have to be saved to device storage, no data processing on the fly. Downloaded files must be stored inside Application.persistentDataPath. This isn't high performance downloader, don't use it to download small files you need immediately. But you can utilize this feature to prefetch files that will be required at some point later. Plugins are compatible with Unity 2018.3 and later. The plugins are avaiilable in a public GitHub repository here. Questions, suggestions and other feedback is welcome here.