diff --git a/tools/help.txt b/tools/help.txt
index 9ce466b301..4f12a88436 100644
--- a/tools/help.txt
+++ b/tools/help.txt
@@ -31,8 +31,12 @@ are automatically detected and applied to the running application.
 The application's database persists between runs. It's stored under
 the .meteor directory in the root of the project.
 
-If you have added any platforms such as ios or android
-using 'meteor add-platform', you can specify which platforms to run your app on.
+You can specify additional platforms where the app should be run if they have
+been previously added with 'meteor add-platform'.
+By default, Meteor will run the app in an emulator. Appending "-device" to the
+end of a platform string (such as "android-device") will run the app on a
+physical device. "ios-device" will open XCode and allow you to manually run
+the app on a device.
 
 Options:
   --port, -p    Port to listen on (instead of the default 3000). Also