This is RevenueDot's MIT fork of RevenueCat's purchases-kmp: the same classes and method names, pointed at a RevenueDot server (RevenueDot Cloud at https://api.revenuedot.app, or one you host) with RevenueDot's response-signing key built in, and kept in sync with upstream.

// build.gradle.kts, commonMain
implementation("app.revenuedot.purchases:purchases-kmp-core:3.10.1")
implementation("app.revenuedot.purchases:purchases-kmp-ui:3.10.1")   // only if you use paywalls

Kotlin packages stay com.revenuecat.purchases.kmp.*, so imports do not change. The iOS library on Maven Central embeds RevenueDot's host and signing key; no RevenueCat host is left in it.

import com.revenuecat.purchases.kmp.Purchases
import com.revenuecat.purchases.kmp.PurchasesConfiguration

fun initPurchases(apiKey: String) {   // appl_... on iOS, goog_... on Android, from the RevenueDot dashboard
    // Self-hosted server only: RevenueDot Cloud (https://api.revenuedot.app) is the default.
    Purchases.proxyURL = "https://revenuedot.example.com"
    Purchases.configure(PurchasesConfiguration(apiKey))
}

The fork already trusts RevenueDot's signing key, so no signature or verification setting is needed. Full guide: https://revenuedot.app/docs/sdks/kotlin-multiplatform.

• Start free on RevenueDot Cloud: free up to $10,000 a month of tracked revenue, then 0.5%, never more than $999 a month (pricing).
• The same REST API and webhook payloads as RevenueCat, so your backend and integrations keep working (API reference).
• Paywalls, experiments and the Customer Center built in the RevenueDot dashboard and rendered by this SDK (guides).
• A one-line migration: point the stock SDK at RevenueDot with setProxyURL, or install this fork and drop the line (migration guide).

Coding agents can read this repository's docs and code on demand, so they use the right package and imports:

• Context7: https://context7.com/revenuedot/purchases-kmp
• DeepWiki: https://deepwiki.com/revenuedot/purchases-kmp
• GitMCP: https://gitmcp.io/revenuedot/purchases-kmp

• Docs for this SDK: https://revenuedot.app/docs/sdks/kotlin-multiplatform
• Releases and changelog: https://github.com/revenuedot/purchases-kmp/releases (tags <upstream version>-revenuedot; upstream's changes are in CHANGELOG.md)
• RevenueDot server and dashboard: https://github.com/revenuedot/revenuedot
• Fork pipeline (what we change and how upstream is merged): https://github.com/revenuedot/revenuedot/tree/main/scripts/forks

RevenueDot is not affiliated with RevenueCat, Inc. RevenueCat's copyright notice stays in LICENSE; RevenueDot's changes are MIT too.

RevenueCat is a powerful, reliable, and free to use in-app purchase server with cross-platform support. Our open-source framework provides a backend and a wrapper around StoreKit and Google Play Billing to make implementing in-app purchases and subscriptions easy.

Whether you are building a new app or already have millions of customers, you can use RevenueCat to:

• Fetch products, make purchases, and check subscription status with our native SDKs.
• Host and configure products remotely from our dashboard.
• Analyze the most important metrics for your app business in one place.
• See customer transaction histories, chart lifetime value, and grant promotional subscriptions.
• Get notified of real-time events through webhooks.
• Send enriched purchase events to analytics and attribution tools with our easy integrations.

Sign up to get started for free.

Purchases is the client for the RevenueCat subscription and purchase tracking system. It is an open source framework that provides a wrapper around BillingClient, StoreKit and the RevenueCat backend to make implementing in-app subscriptions in Kotlin Multiplatform easy - receipt validation and status tracking included!

This SDK started out as an independent project named KobanKat, built by @JayShortway. If you're currently using KobanKat, check out our migration guide

For more detailed information, you can view our complete documentation at docs.revenuecat.com.

Please follow the Quickstart Guide for more information on how to install the SDK.

This codelab is a step-by-step tutorial designed to help you learn and master the RevenueCat SDK taking you from the absolute basics to more advanced implementation. Whether you're just getting started or looking to deepen your understanding, this guide walks you through everything you need to go from zero to hero with RevenueCat.

1. RevenueCat Google Play Integration: In this codelab, you'll learn how to:

   • Properly configure products on Google Play.
   • Set up the RevenueCat dashboard and connect it to your Google Play products.
   • Understanding Product, Offering, Package, and Entitlement.
   • Create paywalls using the Paywall Editor.

2. Kotlin Multiplatform Purchases & Paywalls Overview: In this codelab, you will:

   • Integrate the RevenueCat SDK into your Kotlin Multiplatform project
   • Implement in-app purchases in your KMP application
   • Learn how to distinguish between paying and non-paying users
   • Build a paywall screen, which is based on the server-driven UI approach

• Java 8+
• Kotlin 2.3.20+
• Android 6.0+ (API level 23+)
• iOS 13.0+
• watchOS 7.0+ (9.0+ on watchosDeviceArm64). Note: Paywalls and Customer Center (the -ui artifact) are iOS only.

Our full SDK reference can be found here.