Visual app theming for modern developers

Design app UI themes. Export every framework.

Build a consistent app color system, compare real UI design styles, preview responsive devices, verify accessibility contrast and export production-ready theme code for Flutter, Android, SwiftUI, React Native and the web.

Open free theme builder See developer exports
✓ No account required ✓ Runs in your browser ✓ Pro is one payment
12UI systems
8code formats
9+device views
$19lifetime launch
APP UI THEME BUILDER · LIVE PREVIEW
LIVE · PHONEWCAG AA · PASS
9:41●●● Wi-Fi ▰
Nova DashboardPK
Build beautifully.One theme across every platform.
Revenue$24.8K
Users8,428
Flutter ThemeData
Jetpack Compose
SwiftUI & React Native
Android XML & CSS
Everything in one workspace

From brand color to production theme.

Explore visual directions, test real app components and hand developers consistent code without rebuilding the theme for each platform.

12 genuinely different design systems

Compare Material 3, Material 2, Cupertino, Fluent, glassmorphism, neumorphism, minimal, luxury, gaming, banking, AI SaaS and brutalist interfaces—not just different color presets.

Material 3CupertinoFluent UIGlassGamingBankingAI SaaS

Responsive device lab

Inspect density and layout on phones, foldables, tablets, iPads, laptops, desktop canvases and watch-sized frames.

Real app screens

Preview dashboards, login, chat, commerce, settings, profile and analytics screens instead of isolated swatches.

Accessibility feedback

Check foreground and background contrast before your design reaches production.

Contrast ratio
7.42:1
AA PASS

Clean design tokens

Keep semantic color names and component decisions consistent across your stack.

--color-primary: #806CFF;
--surface: #FFFFFF;
borderRadius: 20px;
Developer-ready handoff

One visual theme. Every codebase.

Stop manually converting colors into framework-specific syntax. Generate consistent theme code from the same visual source of truth.

✓Semantic colors and design tokens that remain understandable after export.
✓Light and dark theme values prepared for production adaptation.
✓Copy code instantly or download project-ready output formats.
Try the code generator → 

          

          
Android XMLcolors & themes
Tailwindconfig tokens
CSScustom properties
JSONdesign tokens

        

      

    


    

      

        
Responsive previewing
See more than one perfect rectangle.
Validate component density, hierarchy and visual rhythm on the screens your customers actually use.

        

          
PHONE
Android & compact
Core free preview

          
FOLDABLE
Foldable
Pro advanced frame

          
TABLET
Tablet & iPad
Wide-layout inspection

          
DESKTOP
Laptop & desktop
Responsive application UI

          
WATCH
Watch canvas
Pro compact preview

        

      

    


    

      

        
A faster workflow
Theme your app in three clear steps.

        

          
STEP 01
Choose a visual system
Start from Material, iOS, Fluent, glass, SaaS, banking, gaming or another ready-made direction.

          
STEP 02
Apply your brand
Set colors, typography, radius, spacing, shadows, navigation, buttons and cards while viewing real screens.

          
STEP 03
Export for development
Copy or download theme code and screenshots for the framework and device you are building.

        

      

    


    

      

        
Simple, honest pricing
Useful free. Powerful for one payment.
Start designing without registration. Upgrade when you need production exports, advanced previews and commercial workflow features.

        

          

            Free
$0 forever
For exploring app visual directions and creating core design tokens.

            
  • 12 design systems
  • 7 realistic app screens
  • Phone, tablet and desktop preview
  • Light and dark themes
  • Contrast checker
  • CSS and JSON export
  • Standard PNG screenshot
  • Local browser project save
  • Advanced framework exports
  • 2× and 4× screenshots

            Use the free tool
          

          

            BEST VALUEPro Lifetime
Regular price $29
$19 one time · launch price
For developers, freelancers and product teams shipping real applications.

            
  • Everything in Free
  • All advanced device frames
  • Flutter ThemeData export
  • Jetpack Compose export
  • Android XML export
  • SwiftUI export
  • React Native and Tailwind export
  • 2× and 4× PNG screenshots
  • Commercial-use license
  • Lifetime Pro updates

            Get Pro Lifetime →
No subscription · One payment · Lifetime access

          

        

        

          
FeatureFreePro Lifetime
Live visual theme editorIncludedIncluded
Core device previews3 devicesAll devices
CSS and JSON tokensIncludedIncluded
Flutter, Compose and SwiftUI—Included
Android XML, React Native, Tailwind—Included
PNG screenshot quality1×1×, 2×, 4×
Commercial usageEvaluationIncluded
Future updatesCore updatesLifetime Pro updates

        

      

    


    

      

        
Frequently asked questions
Everything you need to start confidently.

        

          
Yes. The free plan includes the live visual editor, 12 design styles, seven app screens, phone/tablet/desktop preview, contrast checking, CSS and JSON exports, local saving and a standard PNG screenshot.

          
Pro unlocks all advanced device frames, Flutter ThemeData, Jetpack Compose, Android XML, SwiftUI, React Native and Tailwind exports, high-resolution screenshots, commercial use and lifetime Pro product updates.

          
No. It is a one-time payment. There is no recurring monthly or annual fee for the lifetime plan.

          
Yes. Pro customers can use exported theme code in personal, client and commercial app projects, subject to the commercial license terms.

          
The developer exports include CSS variables, JSON design tokens, Flutter ThemeData, Jetpack Compose Kotlin, Android XML, SwiftUI, React Native and Tailwind CSS.

          
The current editor works in your browser. Theme generation and free local saving happen on your device. Future optional cloud features may use accounts and secure server storage.

          
Yes. Free users can download a standard PNG. Pro adds larger 2× and 4× exports for app listings, presentations and developer handoff.

        

      

    


    

      

        
 Start without creating an account
Build your first professional app theme today.
Choose a design system, apply your colors and preview your interface across devices before writing theme code.
Open free builderRead developer docs