Why I Started Using react-native-unistyles in My React Native Apps

Styling in React Native looks simple in the beginning. We all start with StyleSheet.create(), add some inline styles, and everything works fine for smaller apps.

But as the app starts growing, styling becomes one of the biggest pain points in the project

You start facing problems like:

• Repeated colors and spacing values
• Complex dark/light mode handling
• Responsive layouts becoming messy
• Large style files
• Performance issues with dynamic styles
• Difficult design system management

This is where react-native-unistyles completely changed the way I handle styling in React Native.

In this article, I’ll explain:

• What react-native-unistyles is
• Why it is different from normal StyleSheet
• How it improves theming and performance
• Where it is useful
• Pros and cons
• Real-world use cases
• Why it is becoming popular among React Native developers

What is react-native-unistyles?

react-native-unistyles is a modern styling library for React Native that focuses on:

• Performance
• Theming
• Responsive design
• Scalable architecture
• Better developer experience

Unlike traditional styling approaches, Unistyles is built around the idea of creating a reactive and optimized design system for React Native apps.

It provides:

• Dynamic themes
• Responsive utilities
• Runtime optimizations
• Babel-powered compile-time optimizations
• Better handling of large-scale UI systems

The Problem with Traditional StyleSheet

React Native’s built-in StyleSheet.create() is great for simple and static apps.

Example:

const styles = StyleSheet.create({
container: {
backgroundColor: '#fff',
flex: 1,
},
});

This works perfectly fine initially.

But once your app grows, you start writing patterns like:

const styles = createStyles(theme);

const createStyles = (theme) =>
StyleSheet.create({
container: {
backgroundColor: theme.colors.background,
},
});

Now every theme change:

• recreates styles
• triggers re-renders
• increases complexity

This becomes difficult to scale in large applications.

How Unistyles is Different

With Unistyles:

const styles = useStyles(theme => ({
container: {
backgroundColor: theme.colors.background,
},
}));

The important difference is:

Unistyles tracks dependencies and optimizes updates internally.

Instead of manually recreating styles everywhere, the library handles updates much more efficiently.

This becomes extremely useful in:

• Large applications
• Theme-heavy apps
• Apps with many dynamic screens
• Complex UI systems

Built-in Theming Support

One of the biggest advantages of Unistyles is theming.

You can define themes like:

export const lightTheme = {
colors: {
background: '#ffffff',
text: '#000000',
},
};

export const darkTheme = {
colors: {
background: '#000000',
text: '#ffffff',
},
};

And switch themes globally with minimal effort.

This makes:

• Dark mode
• Multiple themes
• Brand customization
• Dynamic UI systems

much easier to manage.

Performance Benefits

This is one of the strongest reasons developers prefer Unistyles.

Traditional dynamic styling often causes:

unnecessary recalculations
unnecessary re-renders
runtime overhead

Unistyles improves this using:

• Babel plugin optimizations
• dependency tracking
• optimized style computation
• efficient updates

This is especially noticeable in:

• Chat applications
• Social media feeds
• Complex dashboards
• Apps with large FlatLists
• Theme-heavy applications

Responsive Design Made Easier

Handling responsive design manually in React Native can become repetitive.

Normally developers use:

• Dimensions
• custom hooks
• window listeners

With Unistyles, responsive utilities are built into the styling system.

This helps create:

• tablet layouts
• orientation-aware UI
• adaptive spacing
• scalable responsive components

in a cleaner way.

Better Design System Architecture

Large applications usually follow a design system approach.

Instead of hardcoded values everywhere:

color: '#000'

you can use semantic tokens:

theme.colors.textPrimary

This creates:

• consistency
• maintainability
• centralized control which is extremely important for scalable projects.

Setup

Installation

npm i react-native-unistyles
or
Yarn add react-native-unistyles

Install dependencies

npm i react-native-nitro-modules
or
yarn add react-native-nitro-modules

babel.config.js

module.exports = function (api) {
  api.cache(true);

  return {
    presets: ["module:@react-native/babel-preset"],
    plugins: [
      [
        "react-native-unistyles/plugin",
        {
          root: "src",
        },
      ],
    ],
  };
};

unistyles.tsx

import { StyleSheet } from 'react-native-unistyles';

export const lightTheme = {
  colors: {
    primary: '#2563EB',
    primaryText: '#FFFFFF',
    secondary: '#EFF6FF',
    background: '#F8FAFC',
    surface: '#FFFFFF',
    surfaceMuted: '#F1F5F9',
    text: '#0F172A',
    textMuted: '#475569',
    border: '#CBD5E1',
    shadow: '#0F172A',
  },
  radii: {
    sm: 6,
    md: 8,
    lg: 12,
  },
  gap: (v: number) => v * 8,
  margin: (v: number) => v * 8,
  padding: (v: number) => v * 8,
} as const;

export const darkTheme = {
  colors: {
    primary: '#60A5FA',
    primaryText: '#020617',
    secondary: '#172554',
    background: '#020617',
    surface: '#0F172A',
    surfaceMuted: '#1E293B',
    text: '#F8FAFC',
    textMuted: '#CBD5E1',
    border: '#334155',
    shadow: '#000000',
  },
  radii: lightTheme.radii,
  gap: lightTheme.gap,
  margin: lightTheme.margin,
  padding: lightTheme.padding,
} as const;

export const redTheme = {
  colors: {
    primary: '#E11D48',
    primaryText: '#FFFFFF',
    secondary: '#FFE4E6',
    background: '#FFF1F2',
    surface: '#FFFFFF',
    surfaceMuted: '#FFE4E6',
    text: '#4C0519',
    textMuted: '#9F1239',
    border: '#FDA4AF',
    shadow: '#9F1239',
  },
  radii: lightTheme.radii,
  gap: lightTheme.gap,
  margin: lightTheme.margin,
  padding: lightTheme.padding,
} as const;

StyleSheet.configure({
  settings: {
    initialTheme: 'light',
  },
  themes: {
    light: lightTheme,
    dark: darkTheme,
    redTheme,
  },
});

export const appThemes = {
  light: lightTheme,
  dark: darkTheme,
  redTheme,
} as const;

export type AppThemeName = keyof typeof appThemes;

declare module 'react-native-unistyles' {
  export interface UnistylesThemes {
    light: typeof lightTheme;
    dark: typeof darkTheme;
    redTheme: typeof redTheme;
  }
}

App.tsx

import { useState } from 'react';
import { Pressable, StatusBar, Text, View } from 'react-native';
import {
  StyleSheet,
  UnistylesRuntime,
  useUnistyles,
} from 'react-native-unistyles';
import {
  SafeAreaProvider,
  useSafeAreaInsets,
} from 'react-native-safe-area-context';
import type { AppThemeName } from './src/helpers/unistyles';

const themeOptions: Array<{ label: string; value: AppThemeName }> = [
  { label: 'Light', value: 'light' },
  { label: 'Dark', value: 'dark' },
  { label: 'Valentine', value: 'redTheme' },
];

function App() {
  return (
    <SafeAreaProvider>
      <AppContent />
    </SafeAreaProvider>
  );
}

function AppContent() {
  const insets = useSafeAreaInsets();
  const { theme, rt } = useUnistyles();
  const [isThemeMenuOpen, setIsThemeMenuOpen] = useState(false);
  const activeTheme = (rt.themeName ?? 'light') as AppThemeName;

  const handleThemeChange = (themeName: AppThemeName) => {
    UnistylesRuntime.setTheme(themeName);
    setIsThemeMenuOpen(false);
  };

  return (
    <View style={styles.container}>
      <StatusBar
        backgroundColor={theme.colors.background}
        barStyle={activeTheme === 'dark' ? 'light-content' : 'dark-content'}
      />

      <View style={[styles.header, { paddingTop: insets.top + theme.padding(2) }]}>
        <View>
          <Text style={styles.eyebrow}>React Native Unistyles</Text>
          <Text style={styles.title}>Demo Project</Text>
        </View>

        <Pressable
          accessibilityRole="button"
          accessibilityLabel="Open theme selector"
          onPress={() => setIsThemeMenuOpen(isOpen => !isOpen)}
          style={styles.changeThemeButton}
        >
          <Text style={styles.changeThemeText}>Change Theme</Text>
        </Pressable>
      </View>

      {isThemeMenuOpen ? (
        <View style={styles.themeMenu}>
          {themeOptions.map(option => {
            const isSelected = option.value === activeTheme;

            return (
              <Pressable
                key={option.value}
                accessibilityRole="button"
                accessibilityState={{ selected: isSelected }}
                onPress={() => handleThemeChange(option.value)}
                style={[
                  styles.themeOption,
                  isSelected && styles.themeOptionSelected,
                ]}
              >
                <Text
                  style={[
                    styles.themeOptionText,
                    isSelected && styles.themeOptionSelectedText,
                  ]}
                >
                  {option.label}
                </Text>
              </Pressable>
            );
          })}
        </View>
      ) : null}

      <View style={styles.content}>
        <View style={styles.card}>
          <Text style={styles.cardTitle}>Theme tokens are active</Text>
          <Text style={styles.cardText}>
            Backgrounds, text, buttons, borders, and surfaces now come from the
            selected Unistyles theme.
          </Text>

          <Pressable style={styles.primaryButton}>
            <Text style={styles.primaryButtonText}>Primary Button</Text>
          </Pressable>
        </View>
      </View>
    </View>
  );
}

const styles = StyleSheet.create(theme => ({
  container: {
    flex: 1,
    backgroundColor: theme.colors.background,
  },
  header: {
    alignItems: 'center',
    backgroundColor: theme.colors.surface,
    borderBottomColor: theme.colors.border,
    borderBottomWidth: 1,
    flexDirection: 'row',
    justifyContent: 'space-between',
    paddingBottom: theme.padding(2),
    paddingHorizontal: theme.padding(2),
  },
  eyebrow: {
    color: theme.colors.textMuted,
    fontSize: 12,
    fontWeight: '700',
    textTransform: 'uppercase',
  },
  title: {
    color: theme.colors.text,
    fontSize: 22,
    fontWeight: '800',
    marginTop: theme.margin(0.5),
  },
  changeThemeButton: {
    backgroundColor: theme.colors.primary,
    borderRadius: theme.radii.md,
    paddingHorizontal: theme.padding(1.5),
    paddingVertical: theme.padding(1),
  },
  changeThemeText: {
    color: theme.colors.primaryText,
    fontSize: 14,
    fontWeight: '700',
  },
  themeMenu: {
    backgroundColor: theme.colors.surface,
    borderBottomColor: theme.colors.border,
    borderBottomWidth: 1,
    flexDirection: 'row',
    gap: theme.gap(1),
    padding: theme.padding(2),
  },
  themeOption: {
    backgroundColor: theme.colors.surfaceMuted,
    borderColor: theme.colors.border,
    borderRadius: theme.radii.md,
    borderWidth: 1,
    paddingHorizontal: theme.padding(1.5),
    paddingVertical: theme.padding(1),
  },
  themeOptionSelected: {
    backgroundColor: theme.colors.primary,
    borderColor: theme.colors.primary,
  },
  themeOptionText: {
    color: theme.colors.text,
    fontSize: 14,
    fontWeight: '700',
  },
  themeOptionSelectedText: {
    color: theme.colors.primaryText,
  },
  content: {
    alignItems: 'center',
    flex: 1,
    justifyContent: 'center',
    padding: theme.padding(3),
  },
  card: {
    backgroundColor: theme.colors.surface,
    borderColor: theme.colors.border,
    borderRadius: theme.radii.lg,
    borderWidth: 1,
    padding: theme.padding(3),
    shadowColor: theme.colors.shadow,
    shadowOffset: {
      height: 8,
      width: 0,
    },
    shadowOpacity: 0.12,
    shadowRadius: 18,
    width: '100%',
  },
  cardTitle: {
    color: theme.colors.text,
    fontSize: 24,
    fontWeight: '800',
    textAlign: 'center',
  },
  cardText: {
    color: theme.colors.textMuted,
    fontSize: 16,
    lineHeight: 23,
    marginTop: theme.margin(1.5),
    textAlign: 'center',
  },
  primaryButton: {
    alignItems: 'center',
    backgroundColor: theme.colors.primary,
    borderRadius: theme.radii.md,
    marginTop: theme.margin(3),
    paddingHorizontal: theme.padding(2),
    paddingVertical: theme.padding(1.5),
  },
  primaryButtonText: {
    color: theme.colors.primaryText,
    fontSize: 16,
    fontWeight: '800',
  },
}));

export default App;

Real-World Use Cases

I personally think Unistyles becomes very valuable in applications that have:

1. Dark/Light Mode

Apps with heavy theme switching benefit a lot from it.

2. Large-Scale Applications

When your app has:

many screens
many developers
reusable design systems

Unistyles helps maintain consistency.

3. Responsive Layouts
Tablet + mobile support becomes cleaner.

4. Design-System Based Products
Apps that rely on:

• reusable components
• spacing tokens
• typography systems
• centralized themes

can scale better.

Pro and Cons of Unistyles

When You Should Use It

I would recommend using Unistyles if your app has:

• Dark/light mode
• Dynamic themes
• Complex UI
• Responsive layouts
• Many reusable components
• Long-term scalability requirements
• When You Might Avoid It

You may not need it if:

• your app is very small
• UI is mostly static
• theming is minimal
• you prefer keeping dependencies minimal

My Final Thoughts

react-native-unistyles is not just another styling library.

It is more like:

a scalable styling and theming system for React Native applications.

For small projects, traditional StyleSheet is still completely fine.

But for medium and large applications, Unistyles can significantly improve:

• maintainability
• performance
• theming
• responsiveness
• overall developer experience

And honestly, once you start building larger React Native apps, you realize styling architecture matters much more than you initially expected.