# Crypterium Documentation > Documentation for Crypterium ## Guides - [Branded App (iOS, Android platforms)](https://docs.crypterium.com/docs/getting-started.md) - [Stages of Branded App Delivery](https://docs.crypterium.com/docs/branded-app-ios-android-platforms.md) - [SDK (native iOS/Android deployed libraries)](https://docs.crypterium.com/docs/sdk-native-iosandroid-deployed-libraries.md) - [Merchant Account Access](https://docs.crypterium.com/docs/partner-auth.md) - [Merchant Configuration](https://docs.crypterium.com/docs/sub-page-1.md) - [User Authentication](https://docs.crypterium.com/docs/sub-page-2.md) - [iOS Authentication](https://docs.crypterium.com/docs/ios-sdk-authentication.md) - [iOS Features Calls](https://docs.crypterium.com/docs/ios-features-calls.md) - [Android Authentication](https://docs.crypterium.com/docs/android-authentication.md) - [Android Features Calls](https://docs.crypterium.com/docs/android-features-calls.md) - [Test Mode](https://docs.crypterium.com/docs/test-mode.md) - [Cryptobox SDK](https://docs.crypterium.com/docs/cryptobox.md) - [Get started](https://docs.crypterium.com/docs/getstarted.md) - [Authentication](https://docs.crypterium.com/docs/authentication.md) - [User profile](https://docs.crypterium.com/docs/userprofile.md) - [User accounts](https://docs.crypterium.com/docs/user-accounts.md) - [KYC verification](https://docs.crypterium.com/docs/kyc.md) - [Operations](https://docs.crypterium.com/docs/operations.md) - [External cards](https://docs.crypterium.com/docs/external-cards.md) - [Buying crypto](https://docs.crypterium.com/docs/pay-in.md) - [Payout to card](https://docs.crypterium.com/docs/pay-out.md) - [Transferring crypto](https://docs.crypterium.com/docs/transferring.md) - [Exchanging crypto](https://docs.crypterium.com/docs/exchange.md) - [Additional classes](https://docs.crypterium.com/docs/classes.md) - [Backend API](https://docs.crypterium.com/docs/backend-api.md) - [Partner account](https://docs.crypterium.com/docs/backend-partner-account.md) - [User account](https://docs.crypterium.com/docs/backend-user-account.md) - [Wallets and money transferring](https://docs.crypterium.com/docs/backend-wallets.md) - [Callbacks](https://docs.crypterium.com/docs/backend-callbacks.md) - [Error format](https://docs.crypterium.com/docs/backend-error-format.md) ## Changelog - [Welcome to Crypterium](https://docs.crypterium.com/changelog/welcome-to-crypterium.md)