Overview
tiun ships two SDKs. They do the same job — payments, subscriptions, and access control — but they are separate packages with separate APIs. Pick the one that matches what you're building.
Web SDK
React Native SDK
For
Any website or web app — React, Vue, Next.js, Nuxt, plain HTML/JS
React Native apps on iOS and Android
API
A global tiun object you call init() on
A <TiunProvider> and hooks
Covers
Authentication, checkout, time-based billing
Authentication and checkout
They are not layered — pick one. The React Native SDK is a standalone package; it does not wrap or depend on @tiun/sdk. A React Native app never installs the web SDK, and the web SDK's tiun.init() API does not apply there.
What the SDK does
Whichever one you use, it's there to:
Accept payments — Open a checkout flow and let users purchase products or subscriptions.
Control access — Gate content behind a paywall based on what the user has bought.
Manage user sessions — Let users log in, log out, and stay signed in across visits.
Everything runs on the client. There's no server-side code required to get started, and no payment UI for you to build — checkout, login, and paywall overlays are all provided.
Building a native app that isn't React Native?
If your app is a native shell (Swift, Kotlin) hosting your own web app in a WebView, the web SDK runs inside that WebView unchanged — see Native apps with a WebView. First-class Swift, Kotlin, and Flutter SDKs are on the roadmap.
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