diff --git a/apps.json b/apps.json
index 8018a4064..00c19f810 100644
--- a/apps.json
+++ b/apps.json
@@ -3065,13 +3065,14 @@
   "name": "Hour Strike",
   "shortName": "Hour Strike",
   "icon": "app-icon.png",
-  "version": "0.01",
+  "version": "0.02",
   "description": "Strike the clock on the hour. A great tool to remind you an hour has passed!",
   "tags": "tool,alarm",
   "readme": "README.md",
   "storage": [
     {"name":"hourstrike.app.js","url":"app.js"},
     {"name":"hourstrike.boot.js","url":"boot.js"},
+    {"name":"hourstrike.js","url":"hourstrike.js"},
     {"name":"hourstrike.img","url":"app-icon.js","evaluate":true}
   ]
 }
diff --git a/apps/hourstrike/ChangeLog b/apps/hourstrike/ChangeLog
index 5560f00bc..769b8ebeb 100644
--- a/apps/hourstrike/ChangeLog
+++ b/apps/hourstrike/ChangeLog
@@ -1 +1,2 @@
-0.01: New App!
+0.01: New App
+0.02: Add different strike intervals and support for quiet time
diff --git a/apps/hourstrike/README.md b/apps/hourstrike/README.md
index 555182290..4fe9595c0 100644
--- a/apps/hourstrike/README.md
+++ b/apps/hourstrike/README.md
@@ -10,12 +10,12 @@ This app is slightly different from [Hour Chime](https://github.com/espruino/Ban
 
 ## Features
 
-- Strikes the hour or the half hour
-- Set up a quiet time
+- Strike the hour, the half hour, or the quarter hour
+- Set up a range of hours that clock will strike
 
 ## Known Issues
 
-1. This app does not know or check whether your clock already chimes on the hour.
+- This app does not know or check whether your clock already chimes on the hour.
 
 ## Creator
 
diff --git a/apps/hourstrike/app.js b/apps/hourstrike/app.js
index 4e39d689e..64d3c34d9 100644
--- a/apps/hourstrike/app.js
+++ b/apps/hourstrike/app.js
@@ -7,10 +7,9 @@ function updateSettings() {
 
 function resetSettings() {
   settings = {
-    on_hour: true,
-    on_half_hour: true,
-    start_hour: 9,
-    end_hour: 21,
+    interval: 3600,
+    start: 9,
+    end: 21,
   };
   updateSettings();
 }
@@ -19,28 +18,22 @@ settings = storage.readJSON('hourstrike.json', 1);
 if (!settings) resetSettings();
 
 function showMainMenu() {
-  var mode = ['off', 'v', 'b', 'vb', 'bv'];
+  var mode_txt = ['Off', 'Hour', 'Half', 'Quarter'];
+  var mode_interval = [-1, 3600, 1800, 900];
   const mainmenu = {
-    '': { 'title': 'Time Passed' },
-    'On hour': {
-      value: settings.on_hour,
-      format: v => v?"ON":"OFF",
+    '': { 'title': 'Hour Strike' },
+    'Mode': {
+      value: mode_interval.indexOf(settings.mode),
+      format: v => mode_txt[v],
       onchange: v => {
-        settings.on_hour = v;
+        settings.interval = mode_interval[v];
         updateSettings();
       }
     },
-    'On half hour': {
-      value: settings.on_half_hour,
-      format: v => v?"ON":"OFF",
-      onchange: v => {
-        settings.on_half_hour = v;
-        updateSettings();
-      }
-    },
-    'Start hour': {
+    'Start': {
       value: settings.start_hour,
       min: 0, max: 23,
+      format: v => v+':00',
       onchange: v=> {
         settings.start_hour = v;
         updateSettings();
@@ -49,6 +42,7 @@ function showMainMenu() {
     'End hour': {
       value: settings.end_hour,
       min: 0, max: 23,
+      format: v => v+':59',
       onchange: v=> {
         settings.end_hour = v;
         updateSettings();
@@ -59,4 +53,4 @@ function showMainMenu() {
   return E.showMenu(mainmenu);
 }
 
-showMainMenu();
\ No newline at end of file
+showMainMenu();
diff --git a/apps/hourstrike/boot.js b/apps/hourstrike/boot.js
index 13748901f..a67e9a6d2 100644
--- a/apps/hourstrike/boot.js
+++ b/apps/hourstrike/boot.js
@@ -1,29 +1,7 @@
 (function() {
   var setting = require('Storage').readJSON('hourstrike.json',1)||[];
-  var notify_on = [];
-
-  if (setting.on_hour || setting.on_harlf_hour) {
-    var cur = new Date();
-    var cur_hour = cur.getHours(), cur_sec = cur.getMinutes()*60+cur.getSeconds();
-    var notify_on = [1800, 3600];
-    var notify_func = function() {
-        Bangle.buzz(200, 0.5)
-            .then(() => new Promise(resolve => setTimeout(resolve,200)))
-            .then(() => Bangle.buzz(200, 0.5));
-    };
-    var wait_sec = -1, notify_hour = cur_hour;
-    if (cur_sec<notify_on[0]) {
-      wait_sec = notify_on[0]-cur_sec;
-    } else if (cur_sec<notify_on[1]) {
-      wait_sec = notify_on[1]-cur_sec;
-      notify_hour += 1;
-    }
-    if (wait_sec>0) {
-      if (setting.start_hour<=notify_hour&&notify_hour<=setting.end_hour) {
-        setTimeout(notify_func, wait_sec*1000);
-        setTimeout(load, wait_sec*1000 + 800);
-      } else {
-        setTimeout(load, t*1000 + 800);
-      }
-  }
+  var cur = new Date();
+  var cur_sec = cur.getMinutes()*60+cur.getSeconds();
+  var notify_sec = setting.interval>0?setting.interval-setting.interval%cur_sec:-1;
+  if (notify_sec>0) setTimeout(load('hourstrike.js'), notify_sec*1000);
 })();
diff --git a/apps/hourstrike/hourstrike.js b/apps/hourstrike/hourstrike.js
new file mode 100644
index 000000000..4d3650d58
--- /dev/null
+++ b/apps/hourstrike/hourstrike.js
@@ -0,0 +1,25 @@
+clearInterval();
+
+var setting = require('Storage').readJSON('hourstrike.json',1)||[];
+var cur = new Date();
+var cur_hour = cur.getHours();
+var cur_min = cur.getMinutes();
+var cur_sec = cur.getSeconds();
+
+var wait_sec;
+if (cur_hour<setting.start) {
+  wait_sec = ((setting.start-1-cur_hour)*60+59-cur_min)*60+60-cur_sec;
+} else if (cur_hour>setting.end) {
+  wait_sec = ((23-cur_hour+setting.start)*60+59-cur_min)*60+60-cur_sec;
+} else {
+  wait_sec = 0;
+}
+
+var notify_func = function () {
+  Bangle.buzz(200, 0.5)
+    .then(() => new Promise(resolve => setTimeout(resolve,200)))
+    .then(() => Bangle.buzz(200, 0.5));
+};
+
+setTimeout(notify_func, wait_sec*1000);
+setTimeout(load, wait_sec*1000+800);