> ## Documentation Index
> Fetch the complete documentation index at: https://docs.encorekit.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Welcome

> Increase your app's ARPU with premium brand offers: real perks, funded by brands, presented at the moments your users care about most.

Encore turns moments you already own into a new revenue stream. At a high-intent moment (a declined paywall, a milestone, a purchase) your app presents a **premium brand offer**: a real perk a brand funds to acquire customers. Never an ad, and never paid for by you or your users. Publishers use Encore to lift subscription ARPU and earn per-activation bounty revenue.

## What are you building?

<CardGroup cols={2}>
  <Card title="Reduce Churn" icon="shield-heart" href="/publishers/use-cases/reduce-churn">
    Recover revenue from users about to leave: catch a cancellation or paywall-abandonment moment and present an offer that offsets their subscription cost.
  </Card>

  <Card title="Reward Users" icon="gift" href="/publishers/use-cases/post-action-reward">
    Earn bounty revenue from moments of accomplishment: celebrate a purchase, streak, or milestone with a brand-funded reward at a moment your app already owns.
  </Card>
</CardGroup>

## Pick your platform

<CardGroup cols={2}>
  <Card title="iOS" icon="apple" href="/publishers/ios/quickstart/install">
    Swift SDK with managed rendering and StoreKit purchase plumbing.
  </Card>

  <Card title="Android" icon="android" href="/publishers/android/quickstart/install">
    Kotlin SDK with managed rendering and Google Play Billing support.
  </Card>

  <Card title="Web" icon="globe" href="/publishers/web/quickstart/install">
    Framework-agnostic JavaScript SDK for React, Vue, Svelte, Angular, or plain JavaScript.
  </Card>

  <Card title="REST API" icon="code" href="/publishers/offers-api/overview">
    Plain REST, no SDK to install: you own the moment and the UI, Encore handles selection, attribution, and verification.
  </Card>
</CardGroup>

<Note>
  Using a cross-platform framework? Use the [React Native](/publishers/react-native/quickstart/install) or [Flutter](/publishers/flutter/quickstart/install) SDK.
</Note>