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This guideline is not applicable for web applications, websites or mobile sites. For native apps and client/server applications however, it is important that the user can access the application without Internet connection. In this way, he/she can consult stored data, check the evolution of measured data, etc.
When no Internet connection is available, the user should be informed about it in a comprehensive way. When internet connectivity fails, the application must continue to operate based upon existing history and be able to sync (if the case) when connectivity is restored.
Also should the design of native applications consider the volume of data and avoid unnecessary traffic.