diff --git a/app/src/main/java/net/voussoir/trkpt/SettingsFragment.kt b/app/src/main/java/net/voussoir/trkpt/SettingsFragment.kt
index 1e68e92..540a51f 100644
--- a/app/src/main/java/net/voussoir/trkpt/SettingsFragment.kt
+++ b/app/src/main/java/net/voussoir/trkpt/SettingsFragment.kt
@@ -208,7 +208,32 @@ class SettingsFragment : PreferenceFragmentCompat(), YesNoDialog.YesNoDialogList
         preferenceCategoryAbout.title = getString(R.string.pref_about_title)
         screen.addPreference(preferenceCategoryAbout)
 
-        // set up "App Version" preference
+        val source_code = Preference(context)
+        source_code.title = "Source code"
+        source_code.setIcon(R.drawable.ic_bug_report_24dp)
+        source_code.summary = "Available on github, gitlab, and codeberg."
+        source_code.setOnPreferenceClickListener {
+            val intent = Intent(Intent.ACTION_VIEW)
+            intent.setData(Uri.parse("https://github.com/voussoir/trkpt"))
+            startActivity(intent)
+            return@setOnPreferenceClickListener true
+        }
+        preferenceCategoryAbout.contains(source_code)
+        screen.addPreference(source_code)
+
+        val fork_notice = Preference(context)
+        fork_notice.title = "trkpt is a fork of Trackbook"
+        fork_notice.setIcon(R.drawable.ic_notebook_24dp)
+        fork_notice.summary = "Thank you y20k"
+        fork_notice.setOnPreferenceClickListener {
+            val intent = Intent(Intent.ACTION_VIEW)
+            intent.setData(Uri.parse("https://codeberg.org/y20k/trackbook"))
+            startActivity(intent)
+            return@setOnPreferenceClickListener true
+        }
+        preferenceCategoryAbout.contains(fork_notice)
+        screen.addPreference(fork_notice)
+
         val preferenceAppVersion = Preference(context)
         preferenceAppVersion.title = getString(R.string.pref_app_version_title)
         preferenceAppVersion.setIcon(R.drawable.ic_info_24dp)
@@ -224,7 +249,6 @@ class SettingsFragment : PreferenceFragmentCompat(), YesNoDialog.YesNoDialogList
         preferenceCategoryAbout.contains(preferenceAppVersion)
         screen.addPreference(preferenceAppVersion)
 
-        // setup preference screen
         preferenceScreen = screen
     }
 
diff --git a/app/src/main/res/drawable/ic_notebook_24dp.xml b/app/src/main/res/drawable/ic_notebook_24dp.xml
new file mode 100644
index 0000000..6ecf1f7
--- /dev/null
+++ b/app/src/main/res/drawable/ic_notebook_24dp.xml
@@ -0,0 +1,12 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:viewportHeight="96.0"
+    android:viewportWidth="96.0"
+    android:height="24dp"
+    android:width="24dp">
+    <path
+        android:fillColor="@color/icon_default"
+        android:pathData="M44,12.99L20.69,8.74L5.12,5.89C2.29,5.38 0,7.44 0,10.49v67.38c0,3.06 2.29,5.96 5.12,6.47l15.57,2.85l22.19,4.05L44,91.46V12.99z"/>
+    <path
+        android:fillColor="@color/icon_default"
+        android:pathData="M90.88,5.89L75.31,8.74L53.12,12.79L52,12.99v78.46l23.31,-4.26l15.57,-2.85c2.83,-0.52 5.12,-3.41 5.12,-6.47V10.49C96,7.44 93.71,5.38 90.88,5.89z"/>
+</vector>