diff --git a/apps/messagesdebug/ChangeLog b/apps/messagesdebug/ChangeLog
new file mode 100644
index 000000000..759f68777
--- /dev/null
+++ b/apps/messagesdebug/ChangeLog
@@ -0,0 +1 @@
+0.01: New app!
\ No newline at end of file
diff --git a/apps/messagesdebug/app.png b/apps/messagesdebug/app.png
new file mode 100644
index 000000000..56b4f8d79
Binary files /dev/null and b/apps/messagesdebug/app.png differ
diff --git a/apps/messagesdebug/boot.js b/apps/messagesdebug/boot.js
new file mode 100644
index 000000000..ee891d04e
--- /dev/null
+++ b/apps/messagesdebug/boot.js
@@ -0,0 +1,3 @@
+Bangle.on("message", (t, m) => {
+  require("Storage").open("messagesdebug.log", "a").write(`${t}: ${JSON.stringify(m)}\n`);
+});
\ No newline at end of file
diff --git a/apps/messagesdebug/interface.html b/apps/messagesdebug/interface.html
new file mode 100644
index 000000000..1236218fb
--- /dev/null
+++ b/apps/messagesdebug/interface.html
@@ -0,0 +1,71 @@
+<html lang="en">
+<head>
+    <link rel="stylesheet" href="../../css/spectre.min.css">
+    <title>Messages Debug</title>
+</head>
+<body>
+<div id="data"></div>
+<button class="btn btn-default" id="btnSave">Save</button>
+<button class="btn btn-default" id="btnDelete">Clear</button>
+<button class="btn btn-default" id="btnReload" style="float:right">Reload</button>
+
+<script src="../../core/lib/interface.js"></script>
+<script>
+  const dataElement = document.getElementById("data");
+  let messages = "";
+
+  function getData() {
+    // show loading window
+    Util.showModal("Loading...");
+    // get the data
+    dataElement.innerHTML = "";
+    Util.readStorageFile(`messagesdebug.log`, data => {
+      messages = data.trim();
+      // remove window
+      Util.hideModal();
+      let disable = false;
+      if (data.length) {
+        dataElement.innerHTML = `<pre style="overflow:auto;border:1px solid black;">${data}</pre>`;
+      } else {
+        dataElement.innerHTML = "<b>No messages found</b>";
+        disable = true;
+      }
+      ['btnSave','btnDelete','btnCopy'].forEach(id=>{
+        document.getElementById(id).disabled = disable;
+      });
+    });
+  }
+
+  const button = (id, fn) => document.getElementById(id).addEventListener("click", fn);
+  // Save messages to file
+  button("btnSave", function() {
+    let a = document.createElement("a");
+    let url = URL.createObjectURL(new Blob([messages], {type: "text/plain"}));
+    a.href = url;
+    a.download = "messagesdebug.log";
+    document.body.appendChild(a);
+    a.click();
+    setTimeout(function() {
+      document.body.removeChild(a);
+      window.URL.revokeObjectURL(url);
+    }, 0);
+  });
+  // Delete the file from the watch
+  button("btnDelete", function() {
+    Util.showModal("Deleting...");
+    Util.eraseStorageFile("messagesdebug.log", function() {
+      Util.hideModal();
+      getData();
+    });
+  });
+  // Reload, in case we're e.g. using the IDE to send test messages
+  button("btnReload", getData);
+
+  // Called when app starts
+  function onInit() {
+    getData();
+  }
+
+</script>
+</body>
+</html>
\ No newline at end of file
diff --git a/apps/messagesdebug/metadata.json b/apps/messagesdebug/metadata.json
new file mode 100644
index 000000000..af3ff0622
--- /dev/null
+++ b/apps/messagesdebug/metadata.json
@@ -0,0 +1,15 @@
+{
+  "id": "messagesdebug",
+  "name": "Messages Debug",
+  "version": "0.01",
+  "description": "Write all messages to a file, for debugging purposes",
+  "icon": "app.png",
+  "type": "bootloader",
+  "tags": "tool,system",
+  "supports": ["BANGLEJS","BANGLEJS2"],
+  "interface": "interface.html",
+  "storage": [
+    {"name":"messagesdebug.boot.js","url":"boot.js"}
+  ],
+  "data": [{"name":"messagesdebug.log"}]
+}
