diff --git a/app/build.gradle b/app/build.gradle
index 164990d8..1a857a75 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -39,6 +39,8 @@ android {
 }
 
 dependencies {
+    def acraVersion = '5.1.3'
+
     implementation fileTree(include: ['*.jar'], dir: 'libs')
     implementation project(':plugin')
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
@@ -57,6 +59,8 @@ dependencies {
     implementation 'de.blox:graphview:0.6.0'
     implementation 'com.zeugmasolutions.localehelper:locale-helper-android:1.0.2'
     implementation 'com.github.daniel-stoneuk:material-about-library:2.4.2'
+    implementation "ch.acra:acra-core:$acraVersion"
+    implementation "ch.acra:acra-toast:$acraVersion"
     testImplementation 'junit:junit:4.12'
     testImplementation 'org.json:json:20160810'
     androidTestImplementation 'androidx.test:runner:1.1.1'
diff --git a/app/src/main/java/ryey/easer/EaserApplication.java b/app/src/main/java/ryey/easer/EaserApplication.java
index bfefe2e1..6e2f0df5 100644
--- a/app/src/main/java/ryey/easer/EaserApplication.java
+++ b/app/src/main/java/ryey/easer/EaserApplication.java
@@ -25,6 +25,7 @@
 import android.content.Intent;
 import android.content.pm.PackageManager;
 import android.content.res.Configuration;
+import android.os.Environment;
 import android.preference.PreferenceManager;
 
 import androidx.core.content.ContextCompat;
@@ -34,10 +35,21 @@
 import com.orhanobut.logger.Logger;
 import com.zeugmasolutions.localehelper.LocaleHelperApplicationDelegate;
 
+import org.acra.ACRA;
+import org.acra.annotation.AcraCore;
+import org.acra.annotation.AcraToast;
+
+import java.io.File;
+
 import ryey.easer.core.log.ActivityLogService;
 
+@AcraCore(buildConfigClass = BuildConfig.class,
+        reportSenderFactoryClasses = ErrorSenderFactory.class)
+@AcraToast(resText=R.string.prompt_error_logged)
 public class EaserApplication extends Application {
 
+    static final String LOG_DIR = new File(Environment.getExternalStorageDirectory(), "/logger/error").getAbsolutePath();
+
     private final LocaleHelperApplicationDelegate localeAppDelegate = new LocaleHelperApplicationDelegate();
 
     @Override
@@ -71,5 +83,6 @@ public void onConfigurationChanged(Configuration newConfig) {
     @Override
     protected void attachBaseContext(Context base) {
         super.attachBaseContext(localeAppDelegate.attachBaseContext(base));
+        ACRA.init(this);
     }
 }
diff --git a/app/src/main/java/ryey/easer/ErrorSender.kt b/app/src/main/java/ryey/easer/ErrorSender.kt
new file mode 100644
index 00000000..8271c2e3
--- /dev/null
+++ b/app/src/main/java/ryey/easer/ErrorSender.kt
@@ -0,0 +1,63 @@
+/*
+ * Copyright (c) 2016 - 2019 Rui Zhao <renyuneyun@gmail.com>
+ *
+ * This file is part of Easer.
+ *
+ * Easer is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Easer is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Easer.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package ryey.easer
+
+import android.content.Context
+import org.acra.ReportField
+import org.acra.data.CrashReportData
+import org.acra.sender.ReportSender
+import java.io.File
+import java.io.FileWriter
+import java.text.SimpleDateFormat
+import java.util.*
+
+class ErrorSender : ReportSender {
+    override fun send(context: Context, errorContent: CrashReportData) {
+        if (SettingsHelper.logging(context)) {
+            val dir = File(EaserApplication.LOG_DIR)
+            if (!dir.exists()) {
+                dir.mkdirs()
+            }
+            val dateFormat = SimpleDateFormat("yyyy_MM_dd_HH_mm_ss")
+            val date = Date()
+            val filename = dateFormat.format(date) + ".log"
+            val reportFile = File(dir, filename)
+            FileWriter(reportFile).use {
+                for (elem in FIELDS) {
+                    it.append("%s: %s\n".format(elem, errorContent.getString(elem)))
+                }
+            }
+
+        }
+    }
+
+    companion object {
+        val FIELDS = arrayOf(
+                ReportField.BUILD_CONFIG,
+                ReportField.APP_VERSION_CODE,
+                ReportField.USER_CRASH_DATE,
+                ReportField.ANDROID_VERSION,
+                ReportField.BRAND,
+                ReportField.PHONE_MODEL,
+                ReportField.PRODUCT,
+                ReportField.STACK_TRACE
+        )
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/ryey/easer/ErrorSenderFactory.kt b/app/src/main/java/ryey/easer/ErrorSenderFactory.kt
new file mode 100644
index 00000000..e189ccba
--- /dev/null
+++ b/app/src/main/java/ryey/easer/ErrorSenderFactory.kt
@@ -0,0 +1,31 @@
+/*
+ * Copyright (c) 2016 - 2019 Rui Zhao <renyuneyun@gmail.com>
+ *
+ * This file is part of Easer.
+ *
+ * Easer is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Easer is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Easer.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package ryey.easer
+
+import android.content.Context
+import org.acra.config.CoreConfiguration
+import org.acra.sender.ReportSender
+import org.acra.sender.ReportSenderFactory
+
+class ErrorSenderFactory : ReportSenderFactory {
+    override fun create(context: Context, config: CoreConfiguration): ReportSender {
+        return ErrorSender()
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/res/values-zh/strings.xml b/app/src/main/res/values-zh/strings.xml
index 1eb478a5..397b4fcb 100644
--- a/app/src/main/res/values-zh/strings.xml
+++ b/app/src/main/res/values-zh/strings.xml
@@ -162,5 +162,6 @@
     <string name="title_donate">捐助</string>
     <string name="title_homepage">個人主頁</string>
     <string name="title_source">源代碼</string>
+    <string name="prompt_error_logged">Easer記錄了一次錯誤。請查看日誌目錄下的error子目錄。</string>
 
 </resources>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index d4a7b350..09ae1ff3 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -96,6 +96,7 @@
     <string name="prompt_delete_failed">Deletion failed. Check if this item is being used.</string>
     <string name="prompt_data_illegal">Prevented saving data with invalid field(s). Please recheck your choices / inputs.</string>
     <string name="prompt_prevented_for_permission">Grant Easer &lt;%s&gt; permission for this to work..</string>
+    <string name="prompt_error_logged">Easer just recorded an error. See the "error" subdirectory of log directory.</string>
 
     <string name="text_app_description">Ease your life by automating routine actions on your device(s).
 \nChain different events and let their corresponding actions performed. No longer need to keep them in mind!