ManchesterIsRed is an iOS app built for hardcore Red Devils across the globe. It follows Manchester United FC in excruciating detail and will keep fans up-to-date on everything United.
You can send this file to other people by email for example.
Or you can host the demo on your own web site.
Use a screen recording software to create an app demo video.
Step by step guide to video recording: How to create an app demo video.
Print your demo storyboard: Print to PDF
Step by step guide to PDF printing: How to print a Demo to PDF.
Build a native Android app and export it to APK.
Step by step guide to APK creation: How to build a native Android demo app.