# Session iOS [Download Session on the App Store](https://getsession.org/iphone) ## Summary Session integrates directly with [Oxen Service Nodes](https://docs.oxen.io/about-the-oxen-blockchain/oxen-service-nodes), which are a set of distributed, decentralized and Sybil resistant nodes. Service Nodes act as servers which store messages, and a set of nodes which allow for onion routing functionality obfuscating users' IP addresses. For a full understanding of how Session works, read the [Session Whitepaper](https://getsession.org/whitepaper). ## Want to contribute? Found a bug or have a feature request? Please search for any [existing issues](https://github.com/loki-project/session-ios/issues) that describe your bugs in order to avoid duplicate submissions. Submissions can be made by making a pull request to our dev branch. If you don't know where to start contributing, try reading the Github issues page for ideas. ## Build instructions Build instructions can be found in [BUILDING.md](BUILDING.md). ## Translations Want to help us translate Session into your language? You can do so at https://crowdin.com/project/session-ios! ## License Copyright 2011 Whisper Systems Copyright 2013-2017 Open Whisper Systems Copyright 2019-2021 The Oxen Project Licensed under the GPLv3: http://www.gnu.org/licenses/gpl-3.0.html