We're working on an offline app, since the all-time online app has issues with connectivity, as it's often used outside in bad cellular regions. The upload of data can often take up to 7 minutes, so we're looking for a way to do the upload in the background, without the app being on screen. Is it possible to queue the synchronization back to the server in the background (and have it retry when unsuccessful) using nanoflows (since only option in offline hybrid apps)?