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+# Opening links in Chrome for iOS</h1>
+
+The easiest way to have your iOS app open links in Chrome is to use the
+[OpenInChromeController](https://github.com/GoogleChrome/OpenInChrome) class.
+This API is described here along with the URI schemes it supports.
+
+## Using OpenInChromeController to open links
+
+The **OpenInChromeController** class provides methods that
+encapsulate the URI schemes and the scheme replacement process also described
+in this document. Use this class to check if Chrome is installed or to specify
+the URL to open.
+
+### Methods
+
+* `isChromeInstalled`: returns YES if Chrome is installed</li>
+* `openInChrome`: opens a given URL in Chrome</li>
+
+For example, use the OpenInChromeController class as follows:
+
+```
+if ([openInController_ isChromeInstalled]) {
+    [openInController_ openInChrome:urlToOpen];
+}
+```
+
+## Downloading the class file
+
+The OpenInChromeController class file is available
+[here](https://github.com/GoogleChrome/OpenInChrome). Copy it into
+your Xcode installation.
+
+The rest of this document describes the underpinnings of this API.
+
+## URI schemes
+
+Chrome for iOS handles the following URI Schemes:
+
+* `googlechrome` for http
+* `googlechromes` for https
+
+To check if Chrome is installed, an app can simply check if either of these URI schemes is available:
+
+```
+[[UIApplication sharedApplication] canOpenURL:
+    [NSURL URLWithString:@"googlechrome://"]];
+```
+
+This step is useful in case an app would like to change the UI depending
+on if Chrome is installed or not. For instance the app could add an
+option to open URLs in Chrome in a share menu or action sheet.
+
+To actually open a URL in Chrome, the URI scheme provided in the URL
+must be changed from `http` or `https` to the Google Chrome equivalent of
+`googlechrome` or `googlechromes` respectively.
+The following sample code opens a URL in Chrome:
+
+```
+NSURL *inputURL = <the URL to open>;
+NSString *scheme = inputURL.scheme;
+
+// Replace the URL Scheme with the Chrome equivalent.
+NSString *chromeScheme = nil;
+if ([scheme isEqualToString:@"http"]) {
+  chromeScheme = @"googlechrome";
+} else if ([scheme isEqualToString:@"https"]) {
+  chromeScheme = @"googlechromes";
+}
+
+// Proceed only if a valid Google Chrome URI Scheme is available.
+if (chromeScheme) {
+  NSString *absoluteString = [inputURL absoluteString];
+  NSRange rangeForScheme = [absoluteString rangeOfString:@":"];
+  NSString *urlNoScheme =
+      [absoluteString substringFromIndex:rangeForScheme.location];
+  NSString *chromeURLString =
+      [chromeScheme stringByAppendingString:urlNoScheme];
+  NSURL *chromeURL = [NSURL URLWithString:chromeURLString];
+
+  // Open the URL with Chrome.
+  [[UIApplication sharedApplication] openURL:chromeURL];
+}
+```
+
+If Chrome is installed, the above code converts the URI scheme found in
+the URL to the Google Chrome equivalent. When Google Chrome opens, the
+URL passed as a parameter will be opened in a new tab.
+
+If Chrome is not installed the user can be prompted to download it from the App Store.
+If the user agrees, the app can open the App Store download page using the following:
+
+```
+[[UIApplication sharedApplication] openURL:[NSURL URLWithString:
+    @"itms-apps://itunes.apple.com/us/app/chrome/id535886823"]];
+```