Create README.md

Author: erfansn

README.md

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+![App banner](media/banner.png)
+
+<p align="center">
+  <a href="https://opensource.org/licenses/Apache-2.0"><img alt="License" src="https://img.shields.io/badge/License-Apache%202.0-blue.svg"/></a>
+  <a href="https://android-arsenal.com/api?level=21"><img alt="API" src="https://img.shields.io/badge/API-21%2B-brightgreen.svg?style=flat"/></a>
+  <a href="https://android-arsenal.com/api?level=21"><img alt="API" src="https://img.shields.io/github/v/release/ErfanSn/SiliconeCalculator?display_name=release&include_prereleases&sort=date"/></a>
+</p>
+
+It's a cloned version of the [Apple calculator](https://apps.apple.com/us/app/calculator/id1069511488) with [Jetpack Compose](https://developer.android.com/jetpack/compose), but with more attractive graphics, history for calculations, and dark and light theme support. 
+
+Design by [SINTHAI](https://www.behance.net/gallery/130717085/The-calculator-) with a slight change.
+
+## 📷 Preview
+<p align="center">
+  <img src="media/preview0.gif" alt="drawing" width="270" />
+  <img src="media/preview1.jpg" alt="drawing" width="270" />
+  <img src="media/preview2.jpg" alt="drawing" width="270" />
+</p>
+
+## 🏛️ Architecture
+The architecture used in this project is [Android recommended architecture](https://developer.android.com/courses/pathways/android-architecture), 
+which I personally believe is a combination of some layers and principles of three architectures MVVM, MVI and Clean, which makes it great.
+
+## 🧪 Testing
+For this project, **unit**, **integration**, **end-to-end** tests have been written based on the pyramid test in the Android test [codelab](https://developer.android.com/codelabs/advanced-android-kotlin-training-testing-test-doubles#2), and in addition,
+a simple **benchmark** test has been written for the COLD startup app to measure the effectiveness of using the Baseline Profile.
+
+## 💯 MAD Score
+![summary](media/summary.png)
+
+## License
+```
+Copyright 2022 Erfan Sn
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+```