Update README.md

README.md

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 # KalmanKt
+
 Kotlin Shared Library for Android, IOS that provides **implementations for Kalman filters and geohash filters** for increase accuracy of Geolocations 
 
-** NOT TESTED **
+It use the Kalman filter algorithm to predict the correction. (Not Extended Kalman Filter, because it's too hard to me >.<)
+
+This library use [Kotlin Multiplatform](https://kotlinlang.org/docs/reference/multiplatform.html) for Kotlin/JVM(Android) and Kotlin/Native(IOS). 
 
 ## Usages
 
 ### Android
 
 #### Install
 
+1. Add 'KalmanKt-Jvm-1.0.0.jar' into libs folder. [Download here](https://github.com/WindSekirun/KalmanKt/tree/master/android)
+2. Sync Project with Gradle.
+
 #### Usage with KalmanProcessor.kt
 
+Because of lack support of Kotlin Multiplatform, This library provide pure implementations for Kalman filters and geohash filters. 
+
+So, This library provide 'KalmanProcessor' to handle predict using KalmanFilter.
+
+1. [Download this code](https://github.com/WindSekirun/KalmanKt/blob/master/android/KalmanProcessor.kt) and put into your project.
+2. Generate instance of KalmanProcessor by `private val kalmanProcessor = KalmanProcessor()`. 
+3. Reset processor before start `LocationManager.requestLocationUpdates`. by `kalmanProcessor.reset(8, 2)`
+4. Receive predicted result by `kalmanProcessor.setLocationCallback(1000) {}`
+5. When `onLocationChanged` is called, call `kalmanProcessor.process(location)`
+
 ### IOS (Swift)
 
 #### Install
 
-#### Usage with KalmanProcessor.kt
+1. Add KalmanKt.framework into XCode project. Download arm64 for real device, x86_64 for simulator. [Download here](https://github.com/WindSekirun/KalmanKt/tree/master/ios)
+2. Add KalmanKt.framework to Embeed Binaries, Linked Frameworks and Libraries.
+3. Disable bitcode by Build Settings > 'Enable Bitcode' to false. Kotlin/Native produces the fully native binaries, not the LLVM bitcode.
+
+#### Usage with KalmanProcessor.swift
+
+TBD. 
+
+(I had no experience developing IOS myself, so I asked a friend for help. It will be updated soon.)
+
+## Update History
+
+- Ver 1.0.0 (2019-01-20) Initial Release
 
 ## License
+
+MIT License.