diff --git a/Casks/s/simplex.rb b/Casks/s/simplex.rb
new file mode 100644
index 0000000000..255c2ee944
--- /dev/null
+++ b/Casks/s/simplex.rb
@@ -0,0 +1,24 @@
+cask "simplex" do
+  arch arm: "aarch64", intel: "x86_64"
+
+  version "5.3.1"
+  sha256 arm:   "cfdaf17794b8b794b919e22edb2b6e0f6f9d1ead153592d937a98c92f476c617",
+         intel: "24d4acac948fa333de3385e59e8930e76df55fae55e31e6f1ab4037a4e68bac6"
+
+  url "https://github.com/simplex-chat/simplex-chat/releases/download/v#{version}/simplex-desktop-macos-#{arch}.dmg",
+      verified: "github.com/simplex-chat/simplex-chat/"
+  name "SimpleX Chat"
+  desc "Messenger for SimpleX protocol"
+  homepage "https://simplex.chat/"
+
+  livecheck do
+    url :url
+    strategy :github_latest
+  end
+
+  depends_on macos: ">= :high_sierra"
+
+  app "SimpleX.app"
+
+  zap trash: "~/Library/Saved Application State/chat.simplex.app.savedState"
+end