Add Apollo iOS to GraphQL Clients section

Author: martijnwalraven

site/code/index.html.js

@@ -313,10 +313,16 @@ Code that executes a hello world GraphQL query with \`graphql-clj\`:
 
 ## GraphQL Clients
 
+### JavaScript
+
   - [Relay](https://facebook.github.io/relay/) ([github](https://github.com/facebook/relay)) ([npm](https://www.npmjs.com/package/react-relay)): Facebook's framework for building React applications that talk to a GraphQL backend.
   - [Apollo Client](http://dev.apollodata.com/react/) ([github](https://github.com/apollostack/apollo-client)): A powerful JavaScript GraphQL client, designed to work well with React, React Native, Angular 2, or just plain JavaScript.
   - [Lokka](https://github.com/kadirahq/lokka): A simple JavaScript GraphQL client that works in all JavaScript environments - the browser, Node.js, and React Native.
 
+### Swift / iOS
+
+- [Apollo iOS](http://dev.apollodata.com/ios/) ([github](https://github.com/apollostack/apollo-ios)): A GraphQL client for iOS that returns results as query-specific Swift types, and integrates with Xcode to show your Swift source and GraphQL side by side, with inline validation errors.
+
 ## Tools
 
   - [graphiql](https://github.com/graphql/graphiql) ([npm](https://www.npmjs.com/package/graphiql)): An interactive in-browser GraphQL IDE.