diff --git a/mastodon/src/main/java/org/joinmastodon/android/fragments/IsOnTop.java b/mastodon/src/main/java/org/joinmastodon/android/fragments/IsOnTop.java
new file mode 100644
index 000000000..e5fa59b3e
--- /dev/null
+++ b/mastodon/src/main/java/org/joinmastodon/android/fragments/IsOnTop.java
@@ -0,0 +1,13 @@
+package org.joinmastodon.android.fragments;
+
+import androidx.annotation.Nullable;
+import androidx.recyclerview.widget.RecyclerView;
+
+public interface IsOnTop {
+	boolean isOnTop();
+
+	default boolean isRecyclerViewOnTop(@Nullable RecyclerView list) {
+		if (list == null) return true;
+		return !list.canScrollVertically(-1);
+	}
+}
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