Make Font Bigger on iPhone is easiest when you use the iPhone feature that directly controls the task instead of changing several unrelated settings.
- Open Settings > Display & Brightness.
- Tap Text Size and move the slider to the right.
- If that is not large enough, open Settings > Accessibility > Display & Text Size > Larger Text.
- Turn on Larger Accessibility Sizes if needed.
- Adjust the larger slider and check a commonly used app.
Dynamic Type affects apps that support it. Display Zoom can make more of the entire interface larger if text size alone is not enough.
If larger text causes buttons or labels to wrap awkwardly, reduce the size slightly or use Display Zoom instead. Accessibility text sizes are designed for readability, but individual apps decide how well their layouts adapt.
When finished, verify the result in the app or setting you changed before making additional adjustments.