Design approach for custom Fiori application

Dear Experts,
Good day to all...!
I am having a query on finalizing design approach for one of my custom Fiori Application development using SAP UI5.
Current Application design and Features:
As now we are having application, which is been used in laptops. The application structure is like (SAP R3 --> SUP -->UI (using .net) [back-end à Middlewareà UI).
The UI is hosted on IIS server and the application type is desktop, so the users can use the application in offline as well.
Once its connected to internet, they push all the data back to SAP via SUP.
Proposal :
We are planning to migrate the same application into Fiori with same offline features and extending to mobiles and devices.
I have few queries here.
What will be the best approach to deploy the application either SUP(Latest version of SMP) or SAP R3.
If SAP R3 to deploy App:
If we choose to deploy the application in R3, How to support the offline usage mobile and devices.
Will the HTML5 local storage or indexed DB’s are sufficient to support the offline usage.
In this case, Shall we drop the SUP/SMP, Since the application directly accessed from SAP R3 ..?
SUP/SMP to deploy the app:
In this case, I need to create (wrap the ui5 files into hybrid application) a hybrid application to support the mobile and devises as native application..? Correct me If I am wrong..:)
Hope I can use the SUP/SMP local storage options to support my offline usage..? Correct me If I am wrong..:)
What will be the best option to support desktop offline usage.
We are yet to take a decision on this.. Please provide your valuable inputs , which will help us to take some decisions.
Thanks & Regards
Rabin D

Hi Anusha,
considering the reusability aspect the components approach is the much better one (see also the best practices dev guide chapter regarding components SAPUI5 SDK - Demo Kit).
It allows you to reuse that component in different applications or other UI components.
I also think that the Application.js approch will not work with Fiori, cause the Fiori Launchpad loads the Components.js of the Fiori app in an Component Container.
Best Regards, Florian

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