diff --git a/app/build.gradle b/app/build.gradle
index 0e164e7..75de6ac 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -50,6 +50,7 @@ dependencies {
     implementation 'androidx.constraintlayout:constraintlayout:2.1.3'
     implementation 'androidx.navigation:navigation-fragment-ktx:2.4.1'
     implementation 'androidx.navigation:navigation-ui-ktx:2.4.1'
+    implementation 'androidx.core:core-ktx:+'
     testImplementation 'junit:junit:4.13.2'
     androidTestImplementation 'androidx.test.ext:junit:1.1.3'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
diff --git a/app/src/main/java/me/superskidder/watchgpt/MainFragment.kt b/app/src/main/java/me/superskidder/watchgpt/MainFragment.kt
index 427ee0f..eac5f1b 100644
--- a/app/src/main/java/me/superskidder/watchgpt/MainFragment.kt
+++ b/app/src/main/java/me/superskidder/watchgpt/MainFragment.kt
@@ -1,7 +1,6 @@
+package me.superskidder.watchgpt
+
 import android.os.Bundle
-import android.speech.tts.TextToSpeech
-import android.speech.tts.TextToSpeech.OnInitListener
-import android.util.Log
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
@@ -12,12 +11,14 @@ import android.widget.TextView
 import androidx.appcompat.app.AlertDialog
 import androidx.fragment.app.Fragment
 import com.google.gson.GsonBuilder
-import me.superskidder.watchgpt.R
 import me.superskidder.watchgpt.config.SimpleConfig
 import me.superskidder.watchgpt.data.ChatCompletionMessage
 import me.superskidder.watchgpt.data.ChatGPTApi
 import me.superskidder.watchgpt.data.ChatGPTRequest
 import me.superskidder.watchgpt.data.ChatGPTResponse
+import me.superskidder.watchgpt.history.messages
+import me.superskidder.watchgpt.history.readHistory
+import me.superskidder.watchgpt.history.saveHistory
 import me.superskidder.watchgpt.speaking.BaiduTranslator
 import okhttp3.OkHttpClient
 import okhttp3.logging.HttpLoggingInterceptor
@@ -26,7 +27,6 @@ import retrofit2.Callback
 import retrofit2.Response
 import retrofit2.Retrofit
 import retrofit2.converter.gson.GsonConverterFactory
-import java.util.Locale
 import java.util.concurrent.TimeUnit
 
 
@@ -42,14 +42,12 @@ class MainFragment : Fragment() {
     private var apiKey = ""
     var systemPrompt = "You are a helpful assistant."
 
-    private var messages: List<ChatCompletionMessage> =
-        listOf(ChatCompletionMessage("system", systemPrompt))
+
 
     override fun onCreateView(
         inflater: LayoutInflater, container: ViewGroup?,
         savedInstanceState: Bundle?
     ): View? {
-
         return inflater.inflate(R.layout.fragment_main, container, false)
     }
 
@@ -100,6 +98,8 @@ class MainFragment : Fragment() {
         }
 
         baiduTranslator = BaiduTranslator()
+        readHistory(requireContext())
+        update()
     }
 
     fun msgBox(title: String, content: String, btn: String) {
@@ -113,6 +113,11 @@ class MainFragment : Fragment() {
         dialog.show()
     }
 
+    override fun onDestroy() {
+        super.onDestroy()
+        saveHistory(requireContext())
+    }
+
 
     private fun sendMessage(message: String) {
         val configManager = SimpleConfig(requireContext())
diff --git a/app/src/main/java/me/superskidder/watchgpt/adapters/MainFragmentAdapter.kt b/app/src/main/java/me/superskidder/watchgpt/adapters/MainFragmentAdapter.kt
index 528cd33..003f4bf 100644
--- a/app/src/main/java/me/superskidder/watchgpt/adapters/MainFragmentAdapter.kt
+++ b/app/src/main/java/me/superskidder/watchgpt/adapters/MainFragmentAdapter.kt
@@ -3,6 +3,7 @@ package me.superskidder.watchgpt.adapters
 import androidx.fragment.app.Fragment
 import androidx.fragment.app.FragmentActivity
 import androidx.viewpager2.adapter.FragmentStateAdapter
+import me.superskidder.watchgpt.MainFragment
 import me.superskidder.watchgpt.SettingsFragment
 
 class MainFragmentAdapter(fragmentActivity: FragmentActivity) :
diff --git a/app/src/main/java/me/superskidder/watchgpt/history/History.java b/app/src/main/java/me/superskidder/watchgpt/history/History.java
deleted file mode 100644
index 927487f..0000000
--- a/app/src/main/java/me/superskidder/watchgpt/history/History.java
+++ /dev/null
@@ -1,4 +0,0 @@
-package me.superskidder.watchgpt.history;
-
-public class History {
-}
diff --git a/app/src/main/java/me/superskidder/watchgpt/history/HistoryUtil.kt b/app/src/main/java/me/superskidder/watchgpt/history/HistoryUtil.kt
new file mode 100644
index 0000000..dd3a6a7
--- /dev/null
+++ b/app/src/main/java/me/superskidder/watchgpt/history/HistoryUtil.kt
@@ -0,0 +1,23 @@
+package me.superskidder.watchgpt.history
+
+import android.content.Context
+import com.google.gson.Gson
+import com.google.gson.GsonBuilder
+import me.superskidder.watchgpt.MainFragment
+import me.superskidder.watchgpt.config.SimpleConfig
+import me.superskidder.watchgpt.data.ChatCompletionMessage
+
+var messages: List<ChatCompletionMessage> = ArrayList()
+fun saveHistory(context: Context) {
+    val configManager = SimpleConfig(context)
+    val gson = GsonBuilder().create()
+    configManager.setString("history", gson.toJson(messages))
+}
+
+fun readHistory(context: Context) {
+    val configManager = SimpleConfig(context)
+    val gson = GsonBuilder().create()
+    val config = configManager.getString("history", gson.toJson(messages))
+    messages = gson.fromJson(config, ArrayList<ChatCompletionMessage>().javaClass)
+    println(messages.forEach(::println))
+}
\ No newline at end of file
diff --git a/build.gradle b/build.gradle
index a9d7811..be5b699 100644
--- a/build.gradle
+++ b/build.gradle
@@ -2,5 +2,5 @@
 plugins {
     id 'com.android.application' version '8.0.2' apply false
     id 'com.android.library' version '8.0.2' apply false
-    id 'org.jetbrains.kotlin.android' version '1.8.0' apply false
+    id 'org.jetbrains.kotlin.android' version '1.9.0-RC' apply false
 }
\ No newline at end of file