# [Android Components](../../README.md) > Samples > Firefox Relay

![](src/main/res/mipmap-xxxhdpi/ic_launcher.webp)

## Concepts

The main concepts shown in the sample app are:

* Usage of the `FxRelay` component.
* Login to Firefox Accounts that provides the session token to access Relay api's.
* Getting the list of `RelayAddress` from the `RelayClient`.

## License

    This Source Code Form is subject to the terms of the Mozilla Public
    License, v. 2.0. If a copy of the MPL was not distributed with this
    file, You can obtain one at http://mozilla.org/MPL/2.0/