diff --git a/app/src/main/java/com/simplemobiletools/gallery/activities/AboutActivity.java b/app/src/main/java/com/simplemobiletools/gallery/activities/AboutActivity.java
deleted file mode 100644
index 51c49523e..000000000
--- a/app/src/main/java/com/simplemobiletools/gallery/activities/AboutActivity.java
+++ /dev/null
@@ -1,110 +0,0 @@
-package com.simplemobiletools.gallery.activities;
-
-import android.content.ActivityNotFoundException;
-import android.content.Intent;
-import android.content.res.Resources;
-import android.net.Uri;
-import android.os.Bundle;
-import android.text.Html;
-import android.text.method.LinkMovementMethod;
-import android.view.View;
-import android.widget.TextView;
-
-import com.simplemobiletools.gallery.BuildConfig;
-import com.simplemobiletools.gallery.Config;
-import com.simplemobiletools.gallery.R;
-
-import java.util.Calendar;
-
-import butterknife.BindView;
-import butterknife.ButterKnife;
-import butterknife.OnClick;
-
-public class AboutActivity extends SimpleActivity {
-    @BindView(R.id.about_copyright) TextView mCopyright;
-    @BindView(R.id.about_email) TextView mEmailTV;
-    @BindView(R.id.about_rate_us) View mRateUs;
-
-    private static Resources mRes;
-
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_about);
-        ButterKnife.bind(this);
-        mRes = getResources();
-
-        setupEmail();
-        setupCopyright();
-        setupRateUs();
-    }
-
-    private void setupEmail() {
-        final String email = mRes.getString(R.string.email);
-        final String appName = mRes.getString(R.string.app_name);
-        final String href = "<a href=\"mailto:" + email + "?subject=" + appName + "\">" + email + "</a>";
-        mEmailTV.setText(Html.fromHtml(href));
-        mEmailTV.setMovementMethod(LinkMovementMethod.getInstance());
-    }
-
-    private void setupCopyright() {
-        final String versionName = BuildConfig.VERSION_NAME;
-        final int year = Calendar.getInstance().get(Calendar.YEAR);
-        final String copyrightText = String.format(mRes.getString(R.string.copyright), versionName, year);
-        mCopyright.setText(copyrightText);
-    }
-
-    private void setupRateUs() {
-        if (Config.newInstance(getApplicationContext()).getIsFirstRun()) {
-            mRateUs.setVisibility(View.GONE);
-        }
-    }
-
-    @OnClick(R.id.about_invite)
-    public void inviteFriend() {
-        final Intent intent = new Intent();
-        final String text = String.format(getString(R.string.share_text), getString(R.string.app_name), getStoreUrl());
-        intent.setAction(Intent.ACTION_SEND);
-        intent.putExtra(Intent.EXTRA_SUBJECT, getString(R.string.app_name));
-        intent.putExtra(Intent.EXTRA_TEXT, text);
-        intent.setType("text/plain");
-        startActivity(Intent.createChooser(intent, getString(R.string.invite_via)));
-    }
-
-    @OnClick(R.id.about_rate_us)
-    public void rateUsClicked() {
-        final Uri uri = Uri.parse("market://details?id=" + getPackageName());
-        try {
-            startActivity(new Intent(Intent.ACTION_VIEW, uri));
-        } catch (ActivityNotFoundException ignored) {
-            startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(getStoreUrl())));
-        }
-    }
-
-    @OnClick(R.id.about_license)
-    public void licenseClicked() {
-        final Intent intent = new Intent(getApplicationContext(), LicenseActivity.class);
-        startActivity(intent);
-    }
-
-    @OnClick(R.id.about_facebook)
-    public void facebookClicked() {
-        String link = "https://www.facebook.com/simplemobiletools";
-        try {
-            getPackageManager().getPackageInfo("com.facebook.katana", 0);
-            link = "fb://page/150270895341774";
-        } catch (Exception ignored) {
-        }
-        startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(link)));
-    }
-
-    @OnClick(R.id.about_gplus)
-    public void googlePlusClicked() {
-        final String link = "https://plus.google.com/communities/104880861558693868382";
-        startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(link)));
-    }
-
-    private String getStoreUrl() {
-        return "https://play.google.com/store/apps/details?id=" + getPackageName();
-    }
-}
diff --git a/app/src/main/kotlin/com/simplemobiletools/gallery/activities/AboutActivity.kt b/app/src/main/kotlin/com/simplemobiletools/gallery/activities/AboutActivity.kt
new file mode 100644
index 000000000..e8f34aa98
--- /dev/null
+++ b/app/src/main/kotlin/com/simplemobiletools/gallery/activities/AboutActivity.kt
@@ -0,0 +1,100 @@
+package com.simplemobiletools.gallery.activities
+
+import android.content.ActivityNotFoundException
+import android.content.Intent
+import android.net.Uri
+import android.os.Bundle
+import android.text.Html
+import android.text.method.LinkMovementMethod
+import android.view.View
+import com.simplemobiletools.gallery.BuildConfig
+import com.simplemobiletools.gallery.R
+import kotlinx.android.synthetic.main.activity_about.*
+import java.util.*
+
+class AboutActivity : SimpleActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_about)
+
+        setupEmail()
+        setupCopyright()
+        setupRateUs()
+        setupInvite()
+        setupLicense()
+        setupFacebook()
+        setupGPlus()
+    }
+
+    private fun setupEmail() {
+        val email = getString(R.string.email)
+        val appName = getString(R.string.app_name)
+        val href = "<a href=\"mailto:$email?subject=$appName\">$email</a>"
+        about_email.text = Html.fromHtml(href)
+        about_email.movementMethod = LinkMovementMethod.getInstance()
+    }
+
+    private fun setupCopyright() {
+        val versionName = BuildConfig.VERSION_NAME
+        val year = Calendar.getInstance().get(Calendar.YEAR)
+        val copyrightText = String.format(getString(R.string.copyright), versionName, year)
+        about_copyright.text = copyrightText
+    }
+
+    private fun setupRateUs() {
+        if (mConfig.isFirstRun) {
+            about_rate_us.visibility = View.GONE
+        } else {
+            about_rate_us.setOnClickListener {
+                val uri = Uri.parse("market://details?id=$packageName")
+                try {
+                    startActivity(Intent(Intent.ACTION_VIEW, uri))
+                } catch (ignored: ActivityNotFoundException) {
+                    startActivity(Intent(Intent.ACTION_VIEW, Uri.parse(getStoreUrl())))
+                }
+            }
+        }
+    }
+
+    fun setupInvite() {
+        about_invite.setOnClickListener {
+            val text = String.format(getString(R.string.share_text), getString(R.string.app_name), getStoreUrl())
+            Intent().apply {
+                action = Intent.ACTION_SEND
+                putExtra(Intent.EXTRA_SUBJECT, getString(R.string.app_name))
+                putExtra(Intent.EXTRA_TEXT, text)
+                type = "text/plain"
+                startActivity(Intent.createChooser(this, getString(R.string.invite_via)))
+            }
+        }
+    }
+
+    fun setupLicense() {
+        about_license.setOnClickListener {
+            val intent = Intent(applicationContext, LicenseActivity::class.java)
+            startActivity(intent)
+        }
+    }
+
+    fun setupFacebook() {
+        about_facebook.setOnClickListener {
+            var link = "https://www.facebook.com/simplemobiletools"
+            try {
+                packageManager.getPackageInfo("com.facebook.katana", 0)
+                link = "fb://page/150270895341774"
+            } catch (ignored: Exception) {
+            }
+
+            startActivity(Intent(Intent.ACTION_VIEW, Uri.parse(link)))
+        }
+    }
+
+    fun setupGPlus() {
+        about_gplus.setOnClickListener {
+            val link = "https://plus.google.com/communities/104880861558693868382"
+            startActivity(Intent(Intent.ACTION_VIEW, Uri.parse(link)))
+        }
+    }
+
+    private fun getStoreUrl() = "https://play.google.com/store/apps/details?id=$packageName"
+}