Thanks for your reply on disconnected workflows in mobile.
Disconnected workflow works in web browser in Mobile nice as you said ,but while using web view in Mobile it is possible cache.
My requirement is only one time user need to download the design to view the downloaded design at offline viewer when he wants or when he don’t have internet signal he can able to view the pervious downloaded design.
For the above requirement we can achieve from Disconnected workflows? Or any other suggestion to mobile offline viewer
The "disconnected workflow" approach (using Service Workers and Cache API; see the blog post, sample code, or the live demo) supports this workflow. In the sample application you can cache a model by clicking the star icon next to it, and after the model has been cached, you can access it any time, even when disconnected from the internet.
Downloading the viewable files (SVF) from Forge and serving them yourself is not officially supported. The only exception is when customers are not allowed to store their data in the cloud, for example, due to government regulations. In that case we encourage you to talk to us (forge (dot) help (at) autodesk (dot) com), and we'll see what we could do.