diff --git a/apps/banglerun/activity.js b/apps/banglerun/activity.js
index 818f9cf2a..94512094c 100644
--- a/apps/banglerun/activity.js
+++ b/apps/banglerun/activity.js
@@ -1,30 +1,35 @@
-import { draw } from './display';
-import { initLog } from './log';
-import { ActivityStatus } from './state';
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.stopActivity = exports.startActivity = exports.clearActivity = void 0;
+const display_1 = require("./display");
+const log_1 = require("./log");
+const state_1 = require("./state");
 function startActivity(state) {
-    if (state.status === ActivityStatus.Stopped) {
-        initLog(state);
+    if (state.status === state_1.ActivityStatus.Stopped) {
+        (0, log_1.initLog)(state);
     }
-    if (state.status === ActivityStatus.Running) {
-        state.status = ActivityStatus.Paused;
+    if (state.status === state_1.ActivityStatus.Running) {
+        state.status = state_1.ActivityStatus.Paused;
     }
     else {
-        state.status = ActivityStatus.Running;
+        state.status = state_1.ActivityStatus.Running;
     }
-    draw(state);
+    (0, display_1.draw)(state);
 }
+exports.startActivity = startActivity;
 function stopActivity(state) {
-    if (state.status === ActivityStatus.Paused) {
+    if (state.status === state_1.ActivityStatus.Paused) {
         clearActivity(state);
     }
-    if (state.status === ActivityStatus.Running) {
-        state.status = ActivityStatus.Paused;
+    if (state.status === state_1.ActivityStatus.Running) {
+        state.status = state_1.ActivityStatus.Paused;
     }
     else {
-        state.status = ActivityStatus.Stopped;
+        state.status = state_1.ActivityStatus.Stopped;
     }
-    draw(state);
+    (0, display_1.draw)(state);
 }
+exports.stopActivity = stopActivity;
 function clearActivity(state) {
     state.duration = 0;
     state.distance = 0;
@@ -32,4 +37,4 @@ function clearActivity(state) {
     state.steps = 0;
     state.cadence = 0;
 }
-export { clearActivity, startActivity, stopActivity };
+exports.clearActivity = clearActivity;
diff --git a/apps/banglerun/app.js b/apps/banglerun/app.js
index af5413cc0..84d03820a 100644
--- a/apps/banglerun/app.js
+++ b/apps/banglerun/app.js
@@ -1,13 +1,15 @@
-import { startActivity, stopActivity } from './activity';
-import { initDisplay } from './display';
-import { initGps } from './gps';
-import { initHrm } from './hrm';
-import { initState } from './state';
-import { initStep } from './step';
-const appState = initState();
-initGps(appState);
-initHrm(appState);
-initStep(appState);
-initDisplay(appState);
-setWatch(() => startActivity(appState), BTN1, { repeat: true, edge: 'falling' });
-setWatch(() => stopActivity(appState), BTN3, { repeat: true, edge: 'falling' });
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+const activity_1 = require("./activity");
+const display_1 = require("./display");
+const gps_1 = require("./gps");
+const hrm_1 = require("./hrm");
+const state_1 = require("./state");
+const step_1 = require("./step");
+const appState = (0, state_1.initState)();
+(0, gps_1.initGps)(appState);
+(0, hrm_1.initHrm)(appState);
+(0, step_1.initStep)(appState);
+(0, display_1.initDisplay)(appState);
+setWatch(() => (0, activity_1.startActivity)(appState), BTN1, { repeat: true, edge: 'falling' });
+setWatch(() => (0, activity_1.stopActivity)(appState), BTN3, { repeat: true, edge: 'falling' });
diff --git a/apps/banglerun/display.js b/apps/banglerun/display.js
index 2768e8973..648482676 100644
--- a/apps/banglerun/display.js
+++ b/apps/banglerun/display.js
@@ -1,4 +1,7 @@
-import { ActivityStatus } from './state';
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.initDisplay = exports.formatTime = exports.formatPace = exports.formatDistance = exports.formatClock = exports.drawValue = exports.drawBackground = exports.drawAll = exports.draw = void 0;
+const state_1 = require("./state");
 const STATUS_COLORS = {
     'STOP': 0xF800,
     'PAUSE': 0xFFE0,
@@ -14,6 +17,7 @@ function initDisplay(state) {
     });
     drawAll(state);
 }
+exports.initDisplay = initDisplay;
 function drawBackground() {
     g.clear();
     g.setColor(0xC618);
@@ -26,12 +30,14 @@ function drawBackground() {
     g.drawString('STEPS', 60, 152);
     g.drawString('CADENCE', 172, 152);
 }
+exports.drawBackground = drawBackground;
 function drawValue(value, x, y) {
     g.setColor(0x0000);
     g.fillRect(x - 60, y, x + 60, y + 30);
     g.setColor(0xFFFF);
     g.drawString(value, x, y);
 }
+exports.drawValue = drawValue;
 function draw(state) {
     g.setFontVector(30);
     g.setFontAlign(0, -1, 0);
@@ -55,27 +61,31 @@ function draw(state) {
     g.setColor(0x0000);
     g.drawString(state.status, 200, 220);
     g.setFont("6x8").setFontAlign(0, 0, 1).setColor(-1);
-    if (state.status === ActivityStatus.Paused) {
+    if (state.status === state_1.ActivityStatus.Paused) {
         g.drawString("START", 236, 60, 1).drawString(" CLEAR ", 236, 180, 1);
     }
-    else if (state.status === ActivityStatus.Running) {
+    else if (state.status === state_1.ActivityStatus.Running) {
         g.drawString(" PAUSE ", 236, 60, 1).drawString(" PAUSE ", 236, 180, 1);
     }
     else {
         g.drawString("START", 236, 60, 1).drawString("      ", 236, 180, 1);
     }
 }
+exports.draw = draw;
 function drawAll(state) {
     drawBackground();
     draw(state);
     Bangle.drawWidgets();
 }
+exports.drawAll = drawAll;
 function formatClock(date) {
     return ('0' + date.getHours()).substr(-2) + ':' + ('0' + date.getMinutes()).substr(-2);
 }
+exports.formatClock = formatClock;
 function formatDistance(meters) {
     return (meters / 1000).toFixed(2);
 }
+exports.formatDistance = formatDistance;
 function formatPace(speed) {
     if (speed < 0.1667) {
         return `__'__"`;
@@ -85,6 +95,7 @@ function formatPace(speed) {
     const sec = pace % 60;
     return ('0' + min).substr(-2) + `'` + ('0' + sec).substr(-2) + `"`;
 }
+exports.formatPace = formatPace;
 function formatTime(time) {
     const seconds = Math.round(time);
     const hrs = Math.floor(seconds / 3600);
@@ -92,4 +103,4 @@ function formatTime(time) {
     const sec = seconds % 60;
     return (hrs ? hrs + ':' : '') + ('0' + min).substr(-2) + `:` + ('0' + sec).substr(-2);
 }
-export { draw, drawAll, drawBackground, drawValue, formatClock, formatDistance, formatPace, formatTime, initDisplay, };
+exports.formatTime = formatTime;
diff --git a/apps/banglerun/gps.js b/apps/banglerun/gps.js
index d06215cd5..35e0f8769 100644
--- a/apps/banglerun/gps.js
+++ b/apps/banglerun/gps.js
@@ -1,11 +1,15 @@
-import { draw } from './display';
-import { updateLog } from './log';
-import { ActivityStatus } from './state';
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.updateGps = exports.readGps = exports.initGps = void 0;
+const display_1 = require("./display");
+const log_1 = require("./log");
+const state_1 = require("./state");
 const EARTH_RADIUS = 6371008.8;
 function initGps(state) {
     Bangle.on('GPS', (gps) => readGps(state, gps));
     Bangle.setGPSPower(1);
 }
+exports.initGps = initGps;
 function readGps(state, gps) {
     state.lat = gps.lat;
     state.lon = gps.lon;
@@ -15,16 +19,17 @@ function readGps(state, gps) {
     state.dop = gps.hdop;
     state.gpsValid = state.fix > 0;
     updateGps(state);
-    draw(state);
+    (0, display_1.draw)(state);
     /* Only log GPS data every 5 secs if we
     have a fix and we're running. */
     if (state.gpsValid &&
-        state.status === ActivityStatus.Running &&
+        state.status === state_1.ActivityStatus.Running &&
         state.timeSinceLog > 5) {
         state.timeSinceLog = 0;
-        updateLog(state);
+        (0, log_1.updateLog)(state);
     }
 }
+exports.readGps = readGps;
 function updateGps(state) {
     const t = Date.now();
     let dt = (t - state.t) / 1000;
@@ -32,7 +37,7 @@ function updateGps(state) {
         dt = 0;
     state.t = t;
     state.timeSinceLog += dt;
-    if (state.status === ActivityStatus.Running) {
+    if (state.status === state_1.ActivityStatus.Running) {
         state.duration += dt;
     }
     if (!state.gpsValid) {
@@ -57,10 +62,10 @@ function updateGps(state) {
     state.x = x;
     state.y = y;
     state.z = z;
-    if (state.status === ActivityStatus.Running) {
+    if (state.status === state_1.ActivityStatus.Running) {
         state.distance += dpMag;
         state.speed = (state.distance / state.duration) || 0;
         state.cadence = (60 * state.steps / state.duration) || 0;
     }
 }
-export { initGps, readGps, updateGps };
+exports.updateGps = updateGps;
diff --git a/apps/banglerun/hrm.js b/apps/banglerun/hrm.js
index 35804f5e8..c002de2f6 100644
--- a/apps/banglerun/hrm.js
+++ b/apps/banglerun/hrm.js
@@ -1,7 +1,11 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.updateHrm = exports.initHrm = void 0;
 function initHrm(state) {
     Bangle.on('HRM', (hrm) => updateHrm(state, hrm));
     Bangle.setHRMPower(1);
 }
+exports.initHrm = initHrm;
 function updateHrm(state, hrm) {
     if (hrm.confidence === 0) {
         return;
@@ -12,4 +16,4 @@ function updateHrm(state, hrm) {
     state.hr += dHr * hrGain;
     state.hrError += (hrError - state.hrError) * hrGain;
 }
-export { initHrm, updateHrm };
+exports.updateHrm = updateHrm;
diff --git a/apps/banglerun/log.js b/apps/banglerun/log.js
index b11409de6..ee2af3091 100644
--- a/apps/banglerun/log.js
+++ b/apps/banglerun/log.js
@@ -1,3 +1,6 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.updateLog = exports.initLog = void 0;
 function initLog(state) {
     const datetime = new Date().toISOString().replace(/[-:]/g, '');
     const date = datetime.substr(2, 6);
@@ -8,6 +11,7 @@ function initLog(state) {
     state.fileWritten = false;
     return state;
 }
+exports.initLog = initLog;
 function updateLog(state) {
     if (!state.fileWritten) {
         state.file.write([
@@ -33,4 +37,4 @@ function updateLog(state) {
         state.steps.toFixed(0),
     ].join(',') + '\n');
 }
-export { initLog, updateLog };
+exports.updateLog = updateLog;
diff --git a/apps/banglerun/state.js b/apps/banglerun/state.js
index 8629d69a7..349ef1954 100644
--- a/apps/banglerun/state.js
+++ b/apps/banglerun/state.js
@@ -1,9 +1,13 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.initState = exports.ActivityStatus = void 0;
 var ActivityStatus;
 (function (ActivityStatus) {
     ActivityStatus["Stopped"] = "STOP";
     ActivityStatus["Paused"] = "PAUSE";
     ActivityStatus["Running"] = "RUN";
 })(ActivityStatus || (ActivityStatus = {}));
+exports.ActivityStatus = ActivityStatus;
 function initState() {
     return {
         fix: NaN,
@@ -30,4 +34,4 @@ function initState() {
         cadence: 0,
     };
 }
-export { ActivityStatus, initState };
+exports.initState = initState;
diff --git a/apps/banglerun/step.js b/apps/banglerun/step.js
index b258a853d..e4acfd66a 100644
--- a/apps/banglerun/step.js
+++ b/apps/banglerun/step.js
@@ -1,10 +1,14 @@
-import { ActivityStatus } from './state';
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.updateStep = exports.initStep = void 0;
+const state_1 = require("./state");
 function initStep(state) {
     Bangle.on('step', () => updateStep(state));
 }
+exports.initStep = initStep;
 function updateStep(state) {
-    if (state.status === ActivityStatus.Running) {
+    if (state.status === state_1.ActivityStatus.Running) {
         state.steps += 1;
     }
 }
-export { initStep, updateStep };
+exports.updateStep = updateStep;
diff --git a/typescript/tsconfig.json b/typescript/tsconfig.json
index 7def102b7..d36465a01 100644
--- a/typescript/tsconfig.json
+++ b/typescript/tsconfig.json
@@ -1,8 +1,8 @@
 {
   "compilerOptions": {
-    "module": "es2015",
+    "module": "commonjs",
     "noImplicitAny": true,
-    "target": "es2015",
+    "target": "es6",
     "allowUnreachableCode": false,
     "allowUnusedLabels": false,
     "noImplicitOverride": true,