Creating a typography style guide for a mobile application involves defining the fonts, sizes, colors, and styles that will be used throughout the app. Here's a basic example of how you can structure a typography style guide in Excel format:

1. Font Styles:

2. Font Sizes:

3. Colors:

4. Font Pairings:

5. Additional Notes:
   • All text should have a line height of 1.5 for better readability.
   • Use text shadows sparingly for emphasis, with a shadow color of #000000 at 1px blur radius.
   • Ensure proper contrast ratios between text and background colors for accessibility compliance.

This is a basic example, and you can expand and customize it further based on your specific design requirements and brand guidelines. Remember to regularly update and maintain your typography style guide as your app evolves.