diff --git a/app/src/main/java/com/hippo/ehviewer/AppConfig.java b/app/src/main/java/com/hippo/ehviewer/AppConfig.java
index edd5ddf0c..03a9f30fe 100644
--- a/app/src/main/java/com/hippo/ehviewer/AppConfig.java
+++ b/app/src/main/java/com/hippo/ehviewer/AppConfig.java
@@ -38,6 +38,7 @@ public class AppConfig {
     private static final String PARSE_ERROR = "parse_error";
     private static final String LOGCAT = "logcat";
     private static final String DATA = "data";
+    private static final String CRASH = "crash";
 
     private static Context sContext;
 
@@ -107,6 +108,11 @@ public class AppConfig {
         return getDirInExternalAppDir(DATA);
     }
 
+    @Nullable
+    public static File getExternalCrashDir() {
+        return getDirInExternalAppDir(CRASH);
+    }
+
     @Nullable
     public static File createExternalTempFile() {
         return FileUtils.createTempFile(getExternalTempDir(), null);
diff --git a/app/src/main/java/com/hippo/ehviewer/Crash.java b/app/src/main/java/com/hippo/ehviewer/Crash.java
new file mode 100644
index 000000000..ea486294a
--- /dev/null
+++ b/app/src/main/java/com/hippo/ehviewer/Crash.java
@@ -0,0 +1,156 @@
+/*
+ * Copyright 2019 Hippo Seven
+ *
+ * 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.
+ */
+
+package com.hippo.ehviewer;
+
+import android.app.Activity;
+import android.content.Context;
+import android.content.pm.PackageInfo;
+import android.content.pm.PackageManager;
+import android.os.Build;
+import android.os.Debug;
+import androidx.annotation.NonNull;
+import com.hippo.scene.StageActivity;
+import com.hippo.util.PackageUtils;
+import com.hippo.util.ReadableTime;
+import com.hippo.yorozuya.FileUtils;
+import com.hippo.yorozuya.IOUtils;
+import com.hippo.yorozuya.OSUtils;
+import java.io.File;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.io.PrintWriter;
+
+public final class Crash {
+  private Crash() {}
+
+  @NonNull
+  private static String avoidNull(String str) {
+    return null != str ? str : "null";
+  }
+
+  private static void collectInfo(Context context, FileWriter fw) throws IOException {
+    try {
+      PackageManager pm = context.getPackageManager();
+      PackageInfo pi = pm.getPackageInfo(context.getPackageName(), PackageManager.GET_ACTIVITIES);
+      if (pi != null) {
+        String versionName = pi.versionName == null ? "null" : pi.versionName;
+        String versionCode = String.valueOf(pi.versionCode);
+        fw.write("======== PackageInfo ========\r\n");
+        fw.write("PackageName=");fw.write(pi.packageName);fw.write("\r\n");
+        fw.write("VersionName=");fw.write(versionName);fw.write("\r\n");
+        fw.write("VersionCode=");fw.write(versionCode);fw.write("\r\n");
+        String signature = PackageUtils.getSignature(context, pi.packageName);
+        fw.write("Signature=");fw.write(null != signature ? signature : "null");fw.write("\r\n");
+        fw.write("\r\n");
+      }
+    } catch (PackageManager.NameNotFoundException e) {
+      fw.write("======== PackageInfo ========\r\n");
+      fw.write("Can't get package information\r\n");
+      fw.write("\r\n");
+    }
+
+    // Runtime
+    String topActivityClazzName = "null";
+    String topSceneClazzName = "null";
+    try {
+      Activity topActivity = ((EhApplication) context.getApplicationContext()).getTopActivity();
+      if (null != topActivity) {
+        topActivityClazzName = topActivity.getClass().getName();
+        if (topActivity instanceof StageActivity) {
+          Class<?> clazz = ((StageActivity) topActivity).getTopSceneClass();
+          if (clazz != null) {
+            topSceneClazzName = clazz.getName();
+          }
+        }
+      }
+    } catch (Throwable e) {
+      // Ignore
+    }
+    fw.write("======== Runtime ========\r\n");
+    fw.write("TopActivity=");fw.write(avoidNull(topActivityClazzName));fw.write("\r\n");
+    fw.write("TopScene=");fw.write(avoidNull(topSceneClazzName));fw.write("\r\n");
+    fw.write("\r\n");
+
+    // Device info
+    fw.write("======== DeviceInfo ========\r\n");
+    fw.write("BOARD=");fw.write(Build.BOARD);fw.write("\r\n");
+    fw.write("BOOTLOADER=");fw.write(Build.BOOTLOADER);fw.write("\r\n");
+    fw.write("CPU_ABI=");fw.write(Build.CPU_ABI);fw.write("\r\n");
+    fw.write("CPU_ABI2=");fw.write(Build.CPU_ABI2);fw.write("\r\n");
+    fw.write("DEVICE=");fw.write(Build.DEVICE);fw.write("\r\n");
+    fw.write("DISPLAY=");fw.write(Build.DISPLAY);fw.write("\r\n");
+    fw.write("FINGERPRINT=");fw.write(Build.FINGERPRINT);fw.write("\r\n");
+    fw.write("HARDWARE=");fw.write(Build.HARDWARE);fw.write("\r\n");
+    fw.write("HOST=");fw.write(Build.HOST);fw.write("\r\n");
+    fw.write("ID=");fw.write(Build.ID);fw.write("\r\n");
+    fw.write("MANUFACTURER=");fw.write(Build.MANUFACTURER);fw.write("\r\n");
+    fw.write("MODEL=");fw.write(Build.MODEL);fw.write("\r\n");
+    fw.write("PRODUCT=");fw.write(Build.PRODUCT);fw.write("\r\n");
+    fw.write("RADIO=");fw.write(Build.getRadioVersion());fw.write("\r\n");
+    fw.write("SERIAL=");fw.write(Build.SERIAL);fw.write("\r\n");
+    fw.write("TAGS=");fw.write(Build.TAGS);fw.write("\r\n");
+    fw.write("TYPE=");fw.write(Build.TYPE);fw.write("\r\n");
+    fw.write("USER=");fw.write(Build.USER);fw.write("\r\n");
+    fw.write("CODENAME=");fw.write(Build.VERSION.CODENAME);fw.write("\r\n");
+    fw.write("INCREMENTAL=");fw.write(Build.VERSION.INCREMENTAL);fw.write("\r\n");
+    fw.write("RELEASE=");fw.write(Build.VERSION.RELEASE);fw.write("\r\n");
+    fw.write("SDK=");fw.write(Integer.toString(Build.VERSION.SDK_INT));fw.write("\r\n");
+    fw.write("MEMORY=");fw.write(
+        FileUtils.humanReadableByteCount(OSUtils.getAppAllocatedMemory(), false));fw.write("\r\n");
+    fw.write("MEMORY_NATIVE=");fw.write(FileUtils.humanReadableByteCount(Debug.getNativeHeapAllocatedSize(), false));fw.write("\r\n");
+    fw.write("MEMORY_MAX=");fw.write(FileUtils.humanReadableByteCount(OSUtils.getAppMaxMemory(), false));fw.write("\r\n");
+    fw.write("MEMORY_TOTAL=");fw.write(FileUtils.humanReadableByteCount(OSUtils.getTotalMemory(), false));fw.write("\r\n");
+    fw.write("\r\n");
+  }
+
+  private static void getThrowableInfo(Throwable t, FileWriter fw) {
+    PrintWriter printWriter = new PrintWriter(fw);
+    t.printStackTrace(printWriter);
+    Throwable cause = t.getCause();
+    while (cause != null) {
+      cause.printStackTrace(printWriter);
+      cause = cause.getCause();
+    }
+  }
+
+  public static void saveCrashLog(Context context, Throwable t) {
+    File dir = AppConfig.getExternalCrashDir();
+    if (dir == null) {
+      return;
+    }
+
+    String nowString = ReadableTime.getFilenamableTime(System.currentTimeMillis());
+    String fileName = "crash-" + nowString + ".log";
+    File file = new File(dir, fileName);
+
+    FileWriter fw = null;
+    try {
+      fw = new FileWriter(file);
+      fw.write("TIME=");fw.write(nowString);fw.write("\r\n");
+      fw.write("\r\n");
+      collectInfo(context, fw);
+      fw.write("======== CrashInfo ========\r\n");
+      getThrowableInfo(t, fw);
+      fw.write("\r\n");
+      fw.flush();
+    } catch (Exception e) {
+      file.delete();
+    } finally {
+      IOUtils.closeQuietly(fw);
+    }
+  }
+}
diff --git a/app/src/main/java/com/hippo/ehviewer/EhApplication.java b/app/src/main/java/com/hippo/ehviewer/EhApplication.java
index 70a3a9d89..799f43cc0 100644
--- a/app/src/main/java/com/hippo/ehviewer/EhApplication.java
+++ b/app/src/main/java/com/hippo/ehviewer/EhApplication.java
@@ -104,6 +104,19 @@ public class EhApplication extends RecordingApplication {
     public void onCreate() {
         instance = this;
 
+        Thread.UncaughtExceptionHandler handler = Thread.getDefaultUncaughtExceptionHandler();
+        Thread.setDefaultUncaughtExceptionHandler((t, e) -> {
+            try {
+                if (Settings.getSaveCrashLog()) {
+                    Crash.saveCrashLog(instance, e);
+                }
+            } catch (Throwable ignored) { }
+
+            if (handler != null) {
+                handler.uncaughtException(t, e);
+            }
+        });
+
         super.onCreate();
 
         GetText.initialize(this);
diff --git a/app/src/main/java/com/hippo/ehviewer/Settings.java b/app/src/main/java/com/hippo/ehviewer/Settings.java
index ddc97a981..ba9579689 100755
--- a/app/src/main/java/com/hippo/ehviewer/Settings.java
+++ b/app/src/main/java/com/hippo/ehviewer/Settings.java
@@ -950,6 +950,13 @@ public class Settings {
         putBoolean(KEY_SAVE_PARSE_ERROR_BODY, value);
     }
 
+    private static final String KEY_SAVE_CRASH_LOG = "save_crash_log";
+    private static final boolean DEFAULT_SAVE_CRASH_LOG = false;
+
+    public static boolean getSaveCrashLog() {
+        return getBoolean(KEY_SAVE_CRASH_LOG, DEFAULT_SAVE_CRASH_LOG);
+    }
+
     public static final String KEY_SECURITY = "security";
     public static final String DEFAULT_SECURITY = "";
 
diff --git a/app/src/main/res/values-zh-rCN/strings.xml b/app/src/main/res/values-zh-rCN/strings.xml
index d1726b9df..f348f1f5b 100755
--- a/app/src/main/res/values-zh-rCN/strings.xml
+++ b/app/src/main/res/values-zh-rCN/strings.xml
@@ -503,6 +503,8 @@
     <string name="settings_advanced">高级</string>
     <string name="settings_advanced_save_parse_error_body">解析失败时保存页面内容</string>
     <string name="settings_advanced_save_parse_error_body_summary">页面内容可能含有隐私敏感信息</string>
+    <string name="settings_advanced_save_crash_log">应用崩溃时保存错误日志</string>
+    <string name="settings_advanced_save_crash_log_summary">错误日志可以帮助开发者修正问题</string>
     <string name="settings_advanced_dump_logcat">导出日志</string>
     <string name="settings_advanced_dump_logcat_summary">保存日志至外置存储器</string>
     <string name="settings_advanced_dump_logcat_failed">导出日志失败</string>
diff --git a/app/src/main/res/values-zh-rHK/strings.xml b/app/src/main/res/values-zh-rHK/strings.xml
index 2d99e782b..6a799c8c2 100755
--- a/app/src/main/res/values-zh-rHK/strings.xml
+++ b/app/src/main/res/values-zh-rHK/strings.xml
@@ -502,6 +502,8 @@
     <string name="settings_advanced">高級</string>
     <string name="settings_advanced_save_parse_error_body">解析失敗時保存頁面內容</string>
     <string name="settings_advanced_save_parse_error_body_summary">頁面內容可能含有隱私敏感信息</string>
+    <string name="settings_advanced_save_crash_log">應用崩潰時保存錯誤日誌</string>
+    <string name="settings_advanced_save_crash_log_summary">錯誤日誌可以幫助開發者修正問題</string>
     <string name="settings_advanced_dump_logcat">導出日誌</string>
     <string name="settings_advanced_dump_logcat_summary">保存日誌至外置存儲器</string>
     <string name="settings_advanced_dump_logcat_failed">導出日誌失敗</string>
diff --git a/app/src/main/res/values-zh-rTW/strings.xml b/app/src/main/res/values-zh-rTW/strings.xml
index 772f877af..4cb64cb2e 100755
--- a/app/src/main/res/values-zh-rTW/strings.xml
+++ b/app/src/main/res/values-zh-rTW/strings.xml
@@ -502,6 +502,8 @@
     <string name="settings_advanced">進階</string>
     <string name="settings_advanced_save_parse_error_body">解析失敗時儲存網頁的內容</string>
     <string name="settings_advanced_save_parse_error_body_summary">網頁內容可能含有敏感的隱私資料</string>
+    <string name="settings_advanced_save_crash_log">應用崩潰時儲存錯誤日誌</string>
+    <string name="settings_advanced_save_crash_log_summary">錯誤日誌可以幫助開發者修正問題</string>
     <string name="settings_advanced_dump_logcat">傾印log</string>
     <string name="settings_advanced_dump_logcat_summary">儲存log紀錄至外接儲存裝置中</string>
     <string name="settings_advanced_dump_logcat_failed">無法傾印log紀錄</string>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index a75696f01..3a198f7e0 100755
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -546,6 +546,8 @@
     <string name="settings_advanced">Advanced</string>
     <string name="settings_advanced_save_parse_error_body">Save html content when parsing error</string>
     <string name="settings_advanced_save_parse_error_body_summary">Html content may be privacy-sensitive</string>
+    <string name="settings_advanced_save_crash_log">Save crash log when app crashes</string>
+    <string name="settings_advanced_save_crash_log_summary">Crash logs help developers fix bugs</string>
     <string name="settings_advanced_dump_logcat">Dump logcat</string>
     <string name="settings_advanced_dump_logcat_summary">Save logcat to external storage</string>
     <string name="settings_advanced_dump_logcat_failed">Dump logcat failed</string>
diff --git a/app/src/main/res/xml/advanced_settings.xml b/app/src/main/res/xml/advanced_settings.xml
index 1d028d918..839337f5f 100644
--- a/app/src/main/res/xml/advanced_settings.xml
+++ b/app/src/main/res/xml/advanced_settings.xml
@@ -24,6 +24,12 @@
         android:summary="@string/settings_advanced_save_parse_error_body_summary"
         android:defaultValue="@bool/beta"/>
 
+    <com.hippo.preference.SwitchPreference
+        android:key="save_crash_log"
+        android:title="@string/settings_advanced_save_crash_log"
+        android:summary="@string/settings_advanced_save_crash_log_summary"
+        android:defaultValue="false"/>
+
     <Preference
         android:key="dump_logcat"
         android:title="@string/settings_advanced_dump_logcat"