# What is RevenueCat?

RevenueCat provides a backend and a wrapper around StoreKit and Google Play Billing to make implementing in-app purchases and subscriptions easy. With our SDK, you can build and manage your app business on any platform without having to maintain IAP infrastructure. You can read more about [how RevenueCat fits into your app](πŸ”—ο»Ώ) or you can [sign up free](πŸ”—ο»Ώ) to start building.

# Android

## Installation

Purchases for Android (Google Play and Amazon Appstore) is available on Maven and can be included via Gradle.

ο»Ώ[![Release](https://img.shields.io/github/release/RevenueCat/purchases-android.svg?style=flat)](πŸ”—ο»Ώ)ο»Ώ

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## Import Purchases

You should now be able to import `Purchases`.

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## Configure Proguard (Optional)

We are adding Proguard rules to the library so you don't need to do anything. If you have any issues finding classes in our SDK, try adding `-keep class com.revenuecat.purchases.** { *; }` to your Proguard configuration.

# Amazon

## Additional Dependencies

Add a new dependency to the build.gradle apart from the regular `purchases` dependency. These new dependencies have the classes needed to use Amazon IAP:

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## Add Amazon public key

Adding support for Amazon requires adding a `.pem` public key to your project. You can configure this key by following Amazon's guide [here](πŸ”—ο»Ώ).

Due to some limitations, RevenueCat will only validate purchases made in production or in Live App Testing and won't validate purchases made with the Amazon App Tester.

# Next Steps

  • Now that you've installed the Purchases SDK in your Android app, get started by [configuring an instance of Purchases ](πŸ”—ο»Ώ)ο»Ώ