What Font Size Should I Use for Mobile App?

Patrick Burnett

When it comes to designing a mobile app, one of the most important factors to consider is the font size. The right font size can greatly impact the user experience, making the app more user-friendly and accessible.

But what font size should you use for your mobile app? Let’s take a closer look.

Why Font Size Matters

The font size you choose can affect how users interact with your app. If the font is too small, users may struggle to read text and could become frustrated. On the other hand, if it’s too large, it could take up too much space on the screen and make it difficult to navigate.

Factors to Consider

There are several factors to consider when choosing a font size for your mobile app. These include:

  • The type of content: Different types of content require different font sizes. For example, headings may require a larger font size than body text.
  • The device screen size: Smaller screens will require smaller fonts so that text is still easily readable.
  • The Target audience: Different age groups may have different visual acuity and preferences for font sizes.

Best Practices for Font Size

So what are some best practices for choosing a font size for your mobile app? Here are some tips:

Use a Standard Font Size

It’s important to use a standard font size that users are familiar with. For body text, a font size between 14px and 16px is recommended.

Use Larger Fonts for Headings

Headings should be larger than body text but still proportional to the screen size. A good rule of thumb is to use a font size between 18px and 24px for headings.

Avoid Tiny Fonts

Fonts that are too small can be difficult to read and strain the user’s eyes. Avoid using fonts smaller than 12px.

Test on Different Devices

It’s important to test your app on different devices to ensure that the font size is appropriate for all screen sizes.


Choosing the right font size for your mobile app is essential for creating a positive user experience. By considering factors such as content type, screen size, and Target audience, you can choose a font size that is both readable and visually appealing.

Remember to use standard font sizes, larger fonts for headings, avoid tiny fonts, and test on different devices. By following these best practices, you’ll be well on your way to creating a successful mobile app.