README.md in rack-simple_user_agent-0.2.1 vs README.md in rack-simple_user_agent-0.2.2

@@ -3,26 +3,30 @@
 [![Gem Version](https://badge.fury.io/rb/rack-simple_user_agent.svg)](https://badge.fury.io/rb/rack-simple_user_agent)
 [![Build Status](https://travis-ci.org/toshimaru/rack-simple_user_agent.svg)](https://travis-ci.org/toshimaru/rack-simple_user_agent)
 [![Coverage Status](https://coveralls.io/repos/github/toshimaru/rack-simple_user_agent/badge.svg)](https://coveralls.io/github/toshimaru/rack-simple_user_agent)
 [![Code Climate](https://codeclimate.com/github/toshimaru/rack-simple_user_agent/badges/gpa.svg)](https://codeclimate.com/github/toshimaru/rack-simple_user_agent)
 
-Rack::SimpleUserAgent is Rack::Request extension which detects  smartphone from user-agent string. There is no complicated logic for the detection, it simply checks if user-agent includes particular string.
+Rack::SimpleUserAgent is Rack::Request extension which detects user-agent from request user-agent string. No complicated logic for the detection, it simply(stupidly) checks if user-agent includes particular string.
 
+**[ANNOUNCEMENT] Current `request.from_smartphone?` behavior is going to be changed in the next version. Please don't use `request.from_smartphone?`, use `request.from_smartphone?`, `request.from_android?` instead depending on the use case.**
+
 ## Installation
 
-Add this line to your application's Gemfile:
+Add this line to your application's `Gemfile`:
 
 ```ruby
 gem 'rack-simple_user_agent'
 ```
 
 ## Usage
 
 ### on Rails
 
-Bundling 'rack-simple_user_agent' automatically makes Rack::SimpleUserAgent methods available. It's convenient when you use the feature [Action Pack Variants](http://guides.rubyonrails.org/4_1_release_notes.html#action-pack-variants) (as of Rails4.1).
+Installing `rack-simple_user_agent` automatically makes all detection methods available. These methods are useful when you use the Rails' [Action Pack Variants](http://guides.rubyonrails.org/4_1_release_notes.html#action-pack-variants) (as of Rails4.1).
 
+For example, you can use below detection methods in your Rails application.
+
 - `request.from_smartphone?`
 - `request.from_android?`
 - `request.from_iphone?`
 - `request.from_windows_phone?`
 
@@ -47,10 +51,10 @@
 ```
 request ── from_smartphone?
          │ ├── from_android?
          │ │   ├── from_android_mobile?
          │ │   └── from_android_tablet?
-         │ ├── from_iphone?
+         │ ├── from_ios?
          │ │   ├── from_ipad?
          │ │   ├── from_iphone?
          │ │   └── from_ipod?
          │ └── from_windows_phone?
          │