diff --git a/app/src/main/kotlin/com/simplemobiletools/smsmessenger/activities/SettingsActivity.kt b/app/src/main/kotlin/com/simplemobiletools/smsmessenger/activities/SettingsActivity.kt
index c9a3d38d..680c3422 100644
--- a/app/src/main/kotlin/com/simplemobiletools/smsmessenger/activities/SettingsActivity.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/smsmessenger/activities/SettingsActivity.kt
@@ -34,6 +34,7 @@ class SettingsActivity : SimpleActivity() {
         setupManageBlockedNumbers()
         setupChangeDateTimeFormat()
         setupFontSize()
+        setupShowCharacterCounter()
         updateTextColors(settings_scrollview)
 
         if (blockedNumbersAtPause != -1 && blockedNumbersAtPause != getBlockedNumbers().hashCode()) {
@@ -106,4 +107,12 @@ class SettingsActivity : SimpleActivity() {
             }
         }
     }
+
+    private fun setupShowCharacterCounter() {
+        settings_show_character_counter.isChecked = config.showCharacterCounter
+        settings_show_character_counter_holder.setOnClickListener {
+            settings_show_character_counter.toggle()
+            config.showCharacterCounter = settings_show_character_counter.isChecked
+        }
+    }
 }
diff --git a/app/src/main/kotlin/com/simplemobiletools/smsmessenger/activities/ThreadActivity.kt b/app/src/main/kotlin/com/simplemobiletools/smsmessenger/activities/ThreadActivity.kt
index 6dc53da3..93034cfe 100644
--- a/app/src/main/kotlin/com/simplemobiletools/smsmessenger/activities/ThreadActivity.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/smsmessenger/activities/ThreadActivity.kt
@@ -263,6 +263,7 @@ class ThreadActivity : SimpleActivity() {
         thread_send_message.applyColorFilter(textColor)
         confirm_manage_contacts.applyColorFilter(textColor)
         thread_add_attachment.applyColorFilter(textColor)
+        thread_character_counter.beVisibleIf(config.showCharacterCounter)
 
         thread_send_message.setOnClickListener {
             sendMessage()
@@ -271,6 +272,7 @@ class ThreadActivity : SimpleActivity() {
         thread_send_message.isClickable = false
         thread_type_message.onTextChangeListener {
             checkSendMessageAvailability()
+            thread_character_counter.text = it.length.toString()
         }
 
         confirm_manage_contacts.setOnClickListener {
diff --git a/app/src/main/kotlin/com/simplemobiletools/smsmessenger/helpers/Config.kt b/app/src/main/kotlin/com/simplemobiletools/smsmessenger/helpers/Config.kt
index c5e95e68..451fe60f 100644
--- a/app/src/main/kotlin/com/simplemobiletools/smsmessenger/helpers/Config.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/smsmessenger/helpers/Config.kt
@@ -13,4 +13,8 @@ class Config(context: Context) : BaseConfig(context) {
     }
 
     fun getUseSIMIdAtNumber(number: String) = prefs.getInt(USE_SIM_ID_PREFIX + number, 0)
+
+    var showCharacterCounter: Boolean
+        get() = prefs.getBoolean(SHOW_CHARACTER_COUNTER, false)
+        set(showCharacterCounter) = prefs.edit().putBoolean(SHOW_CHARACTER_COUNTER, showCharacterCounter).apply()
 }
diff --git a/app/src/main/kotlin/com/simplemobiletools/smsmessenger/helpers/Constants.kt b/app/src/main/kotlin/com/simplemobiletools/smsmessenger/helpers/Constants.kt
index d98055db..d4190f1a 100644
--- a/app/src/main/kotlin/com/simplemobiletools/smsmessenger/helpers/Constants.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/smsmessenger/helpers/Constants.kt
@@ -11,6 +11,7 @@ const val THREAD_ATTACHMENT_URI = "thread_attachment_uri"
 const val THREAD_ATTACHMENT_URIS = "thread_attachment_uris"
 const val USE_SIM_ID_PREFIX = "use_sim_id_"
 const val NOTIFICATION_CHANNEL = "simple_sms_messenger"
+const val SHOW_CHARACTER_COUNTER = "show_character_counter"
 
 private const val PATH = "com.simplemobiletools.smsmessenger.action."
 const val MARK_AS_READ = PATH + "mark_as_read"
diff --git a/app/src/main/res/layout/activity_settings.xml b/app/src/main/res/layout/activity_settings.xml
index 618b9b70..c71368f9 100644
--- a/app/src/main/res/layout/activity_settings.xml
+++ b/app/src/main/res/layout/activity_settings.xml
@@ -149,5 +149,28 @@
                 android:clickable="false" />
 
         </RelativeLayout>
+
+        <RelativeLayout
+            android:id="@+id/settings_show_character_counter_holder"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="@dimen/medium_margin"
+            android:background="?attr/selectableItemBackground"
+            android:paddingStart="@dimen/normal_margin"
+            android:paddingTop="@dimen/activity_margin"
+            android:paddingEnd="@dimen/normal_margin"
+            android:paddingBottom="@dimen/activity_margin">
+
+            <com.simplemobiletools.commons.views.MySwitchCompat
+                android:id="@+id/settings_show_character_counter"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:background="@null"
+                android:clickable="false"
+                android:paddingStart="@dimen/medium_margin"
+                android:text="@string/show_character_counter"
+                app:switchPadding="@dimen/medium_margin" />
+
+        </RelativeLayout>
     </LinearLayout>
 </ScrollView>
diff --git a/app/src/main/res/layout/activity_thread.xml b/app/src/main/res/layout/activity_thread.xml
index 33ec03ed..240c0c39 100644
--- a/app/src/main/res/layout/activity_thread.xml
+++ b/app/src/main/res/layout/activity_thread.xml
@@ -66,6 +66,7 @@
             android:layout_marginStart="@dimen/medium_margin"
             android:layout_marginEnd="@dimen/medium_margin"
             android:background="?selectableItemBackgroundBorderless"
+            android:contentDescription="@string/confirm_selection"
             android:paddingStart="@dimen/medium_margin"
             android:paddingEnd="@dimen/medium_margin"
             android:src="@drawable/ic_check_vector"
@@ -125,6 +126,7 @@
         android:layout_marginEnd="@dimen/small_margin"
         android:alpha="0.9"
         android:background="?selectableItemBackgroundBorderless"
+        android:contentDescription="@string/attachment"
         android:padding="@dimen/normal_margin"
         android:src="@drawable/ic_plus_vector" />
 
@@ -166,14 +168,17 @@
 
     <ImageView
         android:id="@+id/thread_select_sim_icon"
-        android:layout_width="@dimen/normal_icon_size"
-        android:layout_height="@dimen/normal_icon_size"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
         android:layout_alignParentBottom="true"
         android:layout_marginTop="@dimen/small_margin"
-        android:layout_toStartOf="@+id/thread_send_message"
+        android:layout_toStartOf="@+id/thread_character_counter"
         android:alpha="0.9"
-        android:background="?selectableItemBackgroundBorderless"
-        android:padding="@dimen/normal_margin"
+        android:background="?attr/selectableItemBackgroundBorderless"
+        android:paddingStart="@dimen/medium_margin"
+        android:paddingTop="@dimen/normal_margin"
+        android:paddingEnd="@dimen/medium_margin"
+        android:paddingBottom="@dimen/normal_margin"
         android:src="@drawable/ic_sim_vector"
         android:visibility="gone" />
 
@@ -190,6 +195,21 @@
         android:visibility="gone"
         tools:text="1" />
 
+    <com.simplemobiletools.commons.views.MyTextView
+        android:id="@+id/thread_character_counter"
+        android:layout_width="wrap_content"
+        android:layout_height="match_parent"
+        android:layout_alignTop="@+id/thread_send_message"
+        android:layout_alignBottom="@+id/thread_send_message"
+        android:layout_toStartOf="@+id/thread_send_message"
+        android:gravity="center"
+        android:paddingStart="@dimen/small_margin"
+        android:paddingEnd="@dimen/small_margin"
+        android:text="0"
+        android:textSize="@dimen/normal_text_size"
+        android:visibility="gone"
+        tools:ignore="HardcodedText" />
+
     <ImageView
         android:id="@+id/thread_send_message"
         android:layout_width="@dimen/normal_icon_size"
@@ -201,6 +221,7 @@
         android:alpha="0.4"
         android:background="?selectableItemBackgroundBorderless"
         android:clickable="false"
+        android:contentDescription="@string/ok"
         android:padding="@dimen/medium_margin"
         android:src="@drawable/ic_send_vector" />