diff --git a/apps/clockcal/ChangeLog b/apps/clockcal/ChangeLog
index 0f501f1fb..6780313ce 100644
--- a/apps/clockcal/ChangeLog
+++ b/apps/clockcal/ChangeLog
@@ -6,4 +6,5 @@
 0.06: Tell clock widgets to hide.
 0.07: Convert Yes/No On/Off in settings to checkboxes
 0.08: Fixed typo in settings.js for DRAGDOWN to make option work
-0.09: You can now back out of the calendar using the button
\ No newline at end of file
+0.09: You can now back out of the calendar using the button
+0.10: Fix linter warnings
diff --git a/apps/clockcal/app.js b/apps/clockcal/app.js
index 3a0025096..185f2adea 100644
--- a/apps/clockcal/app.js
+++ b/apps/clockcal/app.js
@@ -24,6 +24,16 @@ const DEBUG = false;
 var state = "watch";
 var monthOffset = 0;
 
+// FIXME: These variables should maybe be defined inside relevant functions below. The linter complained they were not defined (i.e. they were added to global scope if I understand correctly).
+let dayInterval;
+let secondInterval;
+let minuteInterval;
+let newmonth;
+let bottomrightY;
+let bottomrightX;
+let rMonth;
+let dimSeconds;
+
 /*
  *   Calendar features
  */
@@ -46,9 +56,9 @@ function drawFullCalendar(monthOffset) {
     if (typeof secondInterval !== "undefined") clearTimeout(secondInterval);
     if (typeof minuteInterval !== "undefined") clearTimeout(minuteInterval);
     var d = addMonths(Date(), monthOffset);
-    tdy = Date().getDate() + "." + Date().getMonth();
+    let tdy = Date().getDate() + "." + Date().getMonth();
     newmonth = false;
-    c_y = 0;
+    let c_y = 0;
     g.reset();
     g.setBgColor(0);
     g.clear();
@@ -60,8 +70,8 @@ function drawFullCalendar(monthOffset) {
     rD.setDate(rD.getDate() - dow);
     var rDate = rD.getDate();
     bottomrightY = c_y - 3;
-    clrsun = s.REDSUN ? '#f00' : '#fff';
-    clrsat = s.REDSUN ? '#f00' : '#fff';
+    let clrsun = s.REDSUN ? '#f00' : '#fff';
+    let clrsat = s.REDSUN ? '#f00' : '#fff';
     var fg = [clrsun, '#fff', '#fff', '#fff', '#fff', '#fff', clrsat];
     for (var y = 1; y <= 11; y++) {
         bottomrightY += CELL_H;
@@ -90,7 +100,7 @@ function caldrawMonth(rDate, c, m, rD) {
     g.setColor(c);
     g.setFont("Vector", 18);
     g.setFontAlign(-1, 1, 1);
-    drawyear = ((rMonth % 11) == 0) ? String(rD.getFullYear()).substr(-2) : "";
+    let drawyear = ((rMonth % 11) == 0) ? String(rD.getFullYear()).substr(-2) : "";
     g.drawString(m + drawyear, bottomrightX, bottomrightY - CELL_H, 1);
     newmonth = false;
 }
@@ -214,6 +224,7 @@ function action(a) {
     if (DEBUG) console.log("action:" + a);
     state = "unknown";
     console.log("state -> unknown");
+    let l;
     switch (a) {
         case "[ignore]":
             drawWatch();
diff --git a/apps/clockcal/metadata.json b/apps/clockcal/metadata.json
index 60e55ceb7..b84b08575 100644
--- a/apps/clockcal/metadata.json
+++ b/apps/clockcal/metadata.json
@@ -1,7 +1,7 @@
 {
   "id": "clockcal",
   "name": "Clock & Calendar",
-  "version": "0.09",
+  "version": "0.10",
   "description": "Clock with Calendar",
   "readme":"README.md",
   "icon": "app.png",
diff --git a/apps/clockcal/settings.js b/apps/clockcal/settings.js
index 19059861a..ea613f5c0 100644
--- a/apps/clockcal/settings.js
+++ b/apps/clockcal/settings.js
@@ -1,6 +1,6 @@
 (function (back) {
     var FILE = "clockcal.json";
-    defaults={
+    const defaults={
         CAL_ROWS: 4, //number of calendar rows.(weeks) Shouldn't exceed 5 when using widgets.
         BUZZ_ON_BT: true, //2x slow buzz on disconnect, 2x fast buzz on connect. Will be extra widget eventually
         MODE24: true, //24h mode vs 12h mode
@@ -12,16 +12,16 @@
         DRAGLEFT: "[AI:agenda]",
         DRAGUP: "[calend.]"
     };
-    settings = Object.assign(defaults, require('Storage').readJSON(FILE, true) || {});
+    let settings = Object.assign(defaults, require('Storage').readJSON(FILE, true) || {});
 
-    actions = ["[ignore]","[calend.]","[AI:music]","[AI:messg]","[AI:agenda]"];
+    let actions = ["[ignore]","[calend.]","[AI:music]","[AI:messg]","[AI:agenda]"];
     require("Storage").list(RegExp(".app.js")).forEach(element => actions.push(element.replace(".app.js","")));
 
     function writeSettings() {
         require('Storage').writeJSON(FILE, settings);
     }
 
-    menu = {
+    const menu = {
         "": { "title": "Clock & Calendar" },
         "< Back": () => back(),
         'Buzz(dis)conn.?': {