diff --git a/android/app/src/main/java/com/metallic/chiaki/regist/RegistActivity.kt b/android/app/src/main/java/com/metallic/chiaki/regist/RegistActivity.kt
index 3b14852..a67e2cd 100644
--- a/android/app/src/main/java/com/metallic/chiaki/regist/RegistActivity.kt
+++ b/android/app/src/main/java/com/metallic/chiaki/regist/RegistActivity.kt
@@ -22,6 +22,8 @@ import android.os.Bundle
 import android.view.View
 import android.view.Window
 import androidx.appcompat.app.AppCompatActivity
+import androidx.lifecycle.Observer
+import androidx.lifecycle.ViewModelProviders
 import com.metallic.chiaki.R
 import com.metallic.chiaki.common.ext.RevealActivity
 import com.metallic.chiaki.lib.RegistInfo
@@ -41,16 +43,43 @@ class RegistActivity: AppCompatActivity(), RevealActivity
 	override val revealIntent: Intent get() = intent
 	override val revealRootLayout: View get() = rootLayout
 
+	private lateinit var viewModel: RegistViewModel
+
 	override fun onCreate(savedInstanceState: Bundle?)
 	{
 		super.onCreate(savedInstanceState)
 		setContentView(R.layout.activity_regist)
 		handleReveal()
 
+		viewModel = ViewModelProviders.of(this).get(RegistViewModel::class.java)
+
 		hostEditText.setText(intent.getStringExtra(EXTRA_HOST) ?: "255.255.255.255")
 		broadcastCheckBox.isChecked = intent.getBooleanExtra(EXTRA_BROADCAST, true)
 
 		registButton.setOnClickListener { doRegist() }
+
+		ps4VersionRadioGroup.check(when(viewModel.ps4Version.value ?: RegistViewModel.PS4Version.GE_7) {
+			RegistViewModel.PS4Version.GE_7 -> R.id.ps4VersionGE7RadioButton
+			RegistViewModel.PS4Version.LT_7 -> R.id.ps4VersionLT7RadioButton
+		})
+
+		ps4VersionRadioGroup.setOnCheckedChangeListener { _, checkedId ->
+			viewModel.ps4Version.value = when(checkedId)
+			{
+				R.id.ps4VersionGE7RadioButton -> RegistViewModel.PS4Version.GE_7
+				R.id.ps4VersionLT7RadioButton -> RegistViewModel.PS4Version.LT_7
+				else -> RegistViewModel.PS4Version.GE_7
+			}
+		}
+
+		viewModel.ps4Version.observe(this, Observer {
+			psnAccountIdHelpGroup.visibility = if(it == RegistViewModel.PS4Version.GE_7) View.VISIBLE else View.GONE
+			psnIdTextInputLayout.hint = getString(when(it)
+			{
+				RegistViewModel.PS4Version.GE_7 -> R.string.hint_regist_psn_account_id
+				RegistViewModel.PS4Version.LT_7 -> R.string.hint_regist_psn_online_id
+			})
+		})
 	}
 
 	private fun doRegist()
@@ -64,7 +93,15 @@ class RegistActivity: AppCompatActivity(), RevealActivity
 		val pinValid = pin.length == PIN_LENGTH
 
 		hostEditText.error = if(!hostValid) getString(R.string.regist_host_invalid) else null
-		psnIdEditText.error = if(!psnIdValid) getString(R.string.regist_psn_id_invalid) else null
+		psnIdEditText.error =
+			if(!psnIdValid)
+				getString(when(viewModel.ps4Version.value ?: RegistViewModel.PS4Version.GE_7)
+				{
+					RegistViewModel.PS4Version.GE_7 -> R.string.regist_psn_account_id_invalid
+					RegistViewModel.PS4Version.LT_7 -> R.string.regist_psn_online_id_invalid
+				})
+			else
+				null
 		pinEditText.error = if(!pinValid) getString(R.string.regist_pin_invalid, PIN_LENGTH) else null
 
 		if(!hostValid || !psnIdValid || !pinValid)
diff --git a/android/app/src/main/java/com/metallic/chiaki/regist/RegistViewModel.kt b/android/app/src/main/java/com/metallic/chiaki/regist/RegistViewModel.kt
new file mode 100644
index 0000000..873008e
--- /dev/null
+++ b/android/app/src/main/java/com/metallic/chiaki/regist/RegistViewModel.kt
@@ -0,0 +1,31 @@
+/*
+ * This file is part of Chiaki.
+ *
+ * Chiaki 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.
+ *
+ * Chiaki 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 Chiaki.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.metallic.chiaki.regist
+
+import androidx.lifecycle.MutableLiveData
+import androidx.lifecycle.ViewModel
+
+class RegistViewModel: ViewModel()
+{
+	enum class PS4Version {
+		GE_7,
+		LT_7
+	}
+
+	val ps4Version = MutableLiveData<PS4Version>(PS4Version.GE_7)
+}
\ No newline at end of file
diff --git a/android/app/src/main/res/layout/activity_regist.xml b/android/app/src/main/res/layout/activity_regist.xml
index aa47b88..40ac926 100644
--- a/android/app/src/main/res/layout/activity_regist.xml
+++ b/android/app/src/main/res/layout/activity_regist.xml
@@ -11,7 +11,8 @@
             android:orientation="vertical"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
-            android:padding="16dp">
+            android:padding="16dp"
+            android:animateLayoutChanges="true">
 
             <ImageView
                 android:id="@+id/iconImageView"
@@ -58,16 +59,67 @@
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 app:layout_constraintTop_toBottomOf="@id/hostTextInputLayout"
-                app:layout_constraintEnd_toEndOf="parent"
+                app:layout_constraintStart_toStartOf="parent"
                 android:text="@string/regist_broadcast"/>
 
+            <RadioGroup
+                android:id="@+id/ps4VersionRadioGroup"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:orientation="horizontal"
+                app:layout_constraintTop_toBottomOf="@id/broadcastCheckBox">
+
+                <com.google.android.material.radiobutton.MaterialRadioButton
+                    android:id="@+id/ps4VersionGE7RadioButton"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="@string/regist_option_ps4_ge_7"
+                    android:layout_weight="1"
+                    android:checked="true"/>
+                <com.google.android.material.radiobutton.MaterialRadioButton
+                    android:id="@+id/ps4VersionLT7RadioButton"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="@string/regist_option_ps4_lt_7"
+                    android:layout_weight="1"/>
+            </RadioGroup>
+
+            <com.google.android.material.textview.MaterialTextView
+                android:id="@+id/psnAccountIdHelpTextView"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                app:layout_constraintTop_toBottomOf="@id/ps4VersionRadioGroup"
+                android:text="@string/regist_psn_account_id_help"
+                android:gravity="center_horizontal"
+                android:textAppearance="?attr/textAppearanceBody1"
+                android:alpha="0.6"
+                android:layout_marginTop="8dp"/>
+
+            <com.google.android.material.textview.MaterialTextView
+                android:id="@+id/psnAccountIdHelpURLTextView"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                app:layout_constraintTop_toBottomOf="@id/psnAccountIdHelpTextView"
+                android:text="@string/regist_psn_account_id_help_url"
+                android:textSize="12sp"
+                android:gravity="center_horizontal"
+                android:autoLink="web"
+                android:textAppearance="?attr/textAppearanceBody1"/>
+
+            <androidx.constraintlayout.widget.Group
+                android:id="@+id/psnAccountIdHelpGroup"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:visibility="visible"
+                app:constraint_referenced_ids="psnAccountIdHelpTextView,psnAccountIdHelpURLTextView"/>
+
             <com.google.android.material.textfield.TextInputLayout
                 android:id="@+id/psnIdTextInputLayout"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
-                android:hint="@string/hint_regist_psn_id"
+                android:hint="@string/hint_regist_psn_online_id"
                 app:startIconDrawable="@drawable/ic_psn_id"
-                app:layout_constraintTop_toBottomOf="@id/broadcastCheckBox"
+                app:layout_constraintTop_toBottomOf="@id/psnAccountIdHelpURLTextView"
                 android:layout_marginTop="16dp">
                 <com.google.android.material.textfield.TextInputEditText
                     android:id="@+id/psnIdEditText"
diff --git a/android/app/src/main/res/values/strings.xml b/android/app/src/main/res/values/strings.xml
index 15c7fda..36528ad 100644
--- a/android/app/src/main/res/values/strings.xml
+++ b/android/app/src/main/res/values/strings.xml
@@ -20,11 +20,17 @@
     <string name="title_regist">Register Console</string>
     <string name="hint_regist_host">Host</string>
     <string name="regist_broadcast">Broadcast</string>
-    <string name="hint_regist_psn_id">PSN ID (username, case-sensitive)</string>
+    <string name="regist_option_ps4_lt_7">PS4 &lt; 7.0</string>
+    <string name="regist_option_ps4_ge_7">PS4 ≥ 7.0</string>
+    <string name="regist_psn_account_id_help">About obtaining your Account ID, see</string>
+    <string name="regist_psn_account_id_help_url">https://github.com/thestr4ng3r/chiaki/blob/master/README.md#obtaining-your-psn-accountid</string>
+    <string name="hint_regist_psn_online_id">PSN Online ID (username, case-sensitive)</string>
+    <string name="hint_regist_psn_account_id">PSN Account ID (8 bytes, base64)</string>
     <string name="hint_regist_pin">PIN</string>
     <string name="action_regist">Register</string>
     <string name="regist_host_invalid">Please enter a valid host name</string>
-    <string name="regist_psn_id_invalid">Please enter a valid PSN ID</string>
+    <string name="regist_psn_online_id_invalid">Please enter a valid PSN ID</string>
+    <string name="regist_psn_account_id_invalid">Please enter a valid 8-byte Account ID in Base64</string>
     <string name="regist_pin_invalid">Please enter a valid %d-digit PIN</string>
     <string name="action_share_log">Share Log</string>
     <string name="regist_info_success">Regist successful.</string>