diff --git a/apps/health/app.js b/apps/health/app.js
index a1fe1a4f7..30f57af19 100644
--- a/apps/health/app.js
+++ b/apps/health/app.js
@@ -46,7 +46,7 @@ function menuHRM() {
 
 function stepsPerHour() {
   E.showMessage(/*LANG*/"Loading...");
-  let data = new Uint16Array(24);
+  var data = new Uint16Array(24);
   require("health").readDay(new Date(), h=>data[h.hr]+=h.steps);
   g.clear(1);
   Bangle.drawWidgets();
@@ -57,7 +57,7 @@ function stepsPerHour() {
 
 function stepsPerDay() {
   E.showMessage(/*LANG*/"Loading...");
-  let data = new Uint16Array(31);
+  var data = new Uint16Array(31);
   require("health").readDailySummaries(new Date(), h=>data[h.day]+=h.steps);
   g.clear(1);
   Bangle.drawWidgets();
@@ -68,8 +68,8 @@ function stepsPerDay() {
 
 function hrmPerHour() {
   E.showMessage(/*LANG*/"Loading...");
-  let data = new Uint16Array(24);
-  let cnt = new Uint8Array(23);
+  var data = new Uint16Array(24);
+  var cnt = new Uint8Array(23);
   require("health").readDay(new Date(), h=>{
     data[h.hr]+=h.bpm;
     if (h.bpm) cnt[h.hr]++;
@@ -84,8 +84,8 @@ function hrmPerHour() {
 
 function hrmPerDay() {
   E.showMessage(/*LANG*/"Loading...");
-  let data = new Uint16Array(31);
-  let cnt = new Uint8Array(31);
+  var data = new Uint16Array(31);
+  var cnt = new Uint8Array(31);
   require("health").readDailySummaries(new Date(), h=>{
     data[h.day]+=h.bpm;
     if (h.bpm) cnt[h.day]++;
@@ -100,7 +100,7 @@ function hrmPerDay() {
 
 function movementPerHour() {
   E.showMessage(/*LANG*/"Loading...");
-  let data = new Uint16Array(24);
+  var data = new Uint16Array(24);
   require("health").readDay(new Date(), h=>data[h.hr]+=h.movement);
   g.clear(1);
   Bangle.drawWidgets();
@@ -111,7 +111,7 @@ function movementPerHour() {
 
 function movementPerDay() {
   E.showMessage(/*LANG*/"Loading...");
-  let data = new Uint16Array(31);
+  var data = new Uint16Array(31);
   require("health").readDailySummaries(new Date(), h=>data[h.day]+=h.movement);
   g.clear(1);
   Bangle.drawWidgets();