Add mobile app source code

[r0ddy]

Description

Include a list of changes made or features created. Include any relevant screenshots or links.

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (change that introduces a bug or causes app to crash, but that we plan on fixing later)
• This change requires a documentation update

How Has This Been Tested?

Provide any test suites/filenames that you had to create/change.

• Test A
• Test B

Checklist

• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings