Supporting Dynamic Type in React Native (iOS)

Well, turns out you can apply:

allowFontScaling={false}

To prevent this.

This worked for me:

<Text allowFontScaling={false}>Do not want font to scale</Text>

To solve this problem globally, set allowFontScaling in defaultProps of your root component like so:

constructor() {
    super();
    Text.defaultProps.allowFontScaling = false; // Disallow dynamic type on iOS
}