App to mockups: offline demos [closed]

I developed an Ionic/Cordova app that doesn't work offline. I'd like to be able to do demos even if I don't have any Internet connections.

I'd like to have interactive mockups to show that are directly generated from the developed app. Different reasons:

• I want the mockups to look exactly like the app
• I want to get them quickly by not having to create mockups manually with tools like Sketch

Do you have any ideas of tools/methods to get these interactive mockups? I was thinking about InVision but I would need some long page screenshots and I don't know how to do this inside my app.