Typography plays an important role in making Android app user interfaces better, but it comes with some challenges:

• Legibility Problems: If the wrong fonts are used, users might find it hard to read, especially on small screens.
• Mixing Styles: Keeping the same typography style on different devices can be tough.
• Cultural Differences: Different fonts might not connect well with everyone, which can lead to confusion.

Solutions:

• Use responsive typography that changes to fit different screen sizes.
• Follow design guidelines like Material Design to keep things consistent.
• Test fonts with real users to get their opinions and make changes as needed.