Production-Ready UI for React Native
Sierra UI gives you a fully-loaded set of production-ready components that feel native on mobile and stay flexible on the web. Use it out of the box, or extend it with your own design system.
Built for a Cross-Platform World.
Sierra UI delivers a seamless experience across platforms—for developers and users alike—guided by the principles that matter in real-world product development:
Native Performance
Mobile UIs should feel natural, not simulated. Sierra UI is built with Reanimated and native gesture APIs at its core. Every interaction feels smooth, responsive, and truly native.
Solutions
Skip reinventing the wheel. Sierra provides complete, ready-to-use solutions like a fully integrated Chat UI and an international phone input—so you can focus on what makes your app unique.
Sensible Defaults
Our components work great out of the box, but when you need more, our internalProps system gives you precise control over every layer—without forking or rewriting.
Beautiful. Powerful. Ready to Ship.
Every Sierra component is built with care—visually polished, accessibility-aware, and production-ready from day one.
Dynamic Theming with Flexible Props.
Fully customize your app’s theme — exactly the way you want it.
Slide 1 of 4: Sierra UI theme
Go Beyond the UI.
Launch Your Full Application in a Week.
You’re using Sierra UI to save hundreds of hours on your frontend. But what about the backend, user authentication, team workspaces, and Stripe billing?
Astro is our complete, production-ready application built with Sierra UI at its core. It gives you the entire, scalable foundation so you can stop building the basics and focus on your unique product.
A Complete App, Not Just a UIIncludes a NestJS backend, secure auth, and team management.
Monetize InstantlyPre-built Stripe integration for subscriptions and billing.
AI-Ready InfrastructureNative support for agentic AI frameworks and vector databases.
You Own the CodeWe deploy the entire, extensible codebase into your cloud accounts.
See How Astro Saves You 1,000+ Hours
Designed for Real-World Challenges.
We’ve designed Sierra UI to handle the edge cases and performance demands that often require hacks in other libraries.
A reliable international phone input.
Building a phone field with country codes, flags, validation, and live formatting can take days of frustrating work.
Our InputTel component handles it all: a searchable country selector, automatic validation via libphonenumber-js, and full i18n support. It’s the phone input you always wanted to just install and use.
A truly cross-platform Date Picker.
Date pickers are a notorious source of cross-platform bugs and inconsistent user experiences. Adding proper internationalization often means more dependencies and boilerplate.
Our DatePicker is designed for a seamless experience on every platform, with support for date ranges and 11 built-in locales out of the box. It delivers a touch-friendly mobile interface without sacrificing the power needed for the web.
Flexible, state-driven Notifications.
Most “toast” systems are fire-and-forget. They’re difficult to control from component state and often can’t display structured information.
Our NotificationProvider is a state-driven component you control directly. It supports full-width banner styles and a structured body for displaying rich content like titles, subtitles, and even financial amounts—perfect for more than just simple alerts.
Start Building with Sierra UI.
Explore the docs and play with real-world examples. Sierra UI helps you deliver high-quality cross-platform apps—faster, and with fewer compromises.