Update README.md

Author: CaliCastle

README.md

@@ -1,30 +1,62 @@
 # TooDoo - Todo List Made Simple
+<p align="center">
+    <img src="https://github.com/CaliCastle/TooDoo/raw/master/TooDoo/Resources/Assets.xcassets/AppIcon.appiconset/App%20Icon%2060%403x.png" />
+</p>
+
 TooDoo is a beautiful and simple to-do list app that helps you manage tasks on a daily basis and painless create new todos in seconds.
 
-### Features list:
-- [x] Add/Update/Delete categories.
-- [x] Reorder categories.
-- [x] Add/Complete/Delete todos.
-- [x] Scheduled notification for todos that have due time.
+## Features list:
+- [x] Add/Update/Delete categories
+- [x] Reorder categories
+- [x] Add/Complete/Delete todos
+- [x] Scheduled notification for todos that have due time
+- [x] Localization support:
+    - [x] English
+    - [x] 简体中文
+    - [ ] Deutsch
+
+## Requirements for running:
+**iOS 10.0+**
+
+_Supported devices:_
+
+    - iPhone X
+    - iPhone 8/8 Plus
+    - iPhone 7/7 Plus
+    - iPhone 6/6 Plus
+    - iPhone SE
+    - iPhone 5s
+    - iPhone 5
+
+### Known issues:
+**Minor issues**
+- Somehow after reordering categories, category collection cell would seem to display improperly.
 
-### Upcoming features:
-- Localization
-- Categorize icons
-- Add location-sensitive notifications for to-dos
+**Major issues**
+- For __iOS 10.*__, navigation item search icon squashed due to auto-layout changes introduced in __iOS 11__.
+
+## Upcoming features:
+
+- Categorize icons for better UX
+- Location-sensitive notifications for to-dos
 - Search
+- iPad & Landscape orientation support
+
+---
 
 ### Open source libraries:
-- M13Checkbox
-- ChameleonFramework
-- BouncyLayout
-- Typist
-- LTMorphingLabel
-- Haptica
-- Motion
-- BulletinBoard
-- Peep
-- ViewAnimator
-- Hokusai
-- DeckTransition
-- NotificationBannerSwift
-- DateTimePicker
+    - M13Checkbox
+    - ChameleonFramework
+    - BouncyLayout
+    - Typist
+    - LTMorphingLabel
+    - Haptica
+    - Motion
+    - BulletinBoard
+    - Peep
+    - ViewAnimator
+    - Hokusai
+    - DeckTransition
+    - NotificationBannerSwift
+    - DateTimePicker
+