Create Calorie Tracking app w/ health integration by RKBoss6 · Pull Request #4142 · espruino/BangleApps

RKBoss6 · 2026-01-25T18:17:08Z

This is just a draft right now, but creates an app for calorie tracking based on #4092, that counts calories burned in a day and splits it by BMR, Active, and total calories. Uses MyProfile to get user health data, and hooks onto health events for new data. Also modifies myprofile to use RHR readings as an additional piece of data, with its own measurement UI.

Check it out at my app loader

Add metadata for Calorie Tracker application

Expanded the README to include the calorie calculation formula and its components, enhancing user understanding of the app's functionality.

…date boot.js to match

…nshot for health, add gender for myprofile

Refactor logic for setting resting heart rate and round max heart rate calculation.

Added instructions for taking Resting Heart Rate (RHR) measurements, including tips for optimal conditions and app navigation.

…nto caloriesApp

… refactored code

…nto caloriesApp

thyttan · 2026-02-06T18:00:57Z

Ah! I can try it out now :)

RKBoss6 · 2026-02-06T18:02:53Z

Sorry, I just put it on my app loader right now

thyttan

Thanks! Here's my initial review :)

apps/calories/README.md

thyttan · 2026-02-06T19:46:54Z

apps/calories/app.js

Please add white space in line with the preferred code style: https://www.espruino.com/Code+Style

Maybe easiest to use some auto formatter for this initial contribution to the repo?

And same for the other js files in the calories directory.

For the changes to the health and myprofile apps please follow the style there as well, but don't auto format the whole files.

Thanks! Just changed this app.js, does that look better?

Yes, thanks! I think so. But you lost all semi-colons at the same time? I think that will make e.g. the web ide editor complain.

Oh no! I didn't even see that 😂, just fixed it!

Unresolved since the other files in the 'calories' directory is yet to be updated wrt white space.

Unresolved since the other files in the 'calories' directory is yet to be updated wrt whitespace.

apps/health/settings.js

apps/myprofile/settings.js

thyttan · 2026-02-06T20:08:41Z

apps/calories/lib.js

@@ -0,0 +1,127 @@
+// Takes object with bpm, movement (in duration), steps (in duration), and duration in minutes
+let calcAge=function(rawBday){
+  let birth = new Date(rawBday);


I get this error, probably because I have not done any setup in the myprofile app?:

Uncaught TypeError: Variables of type undefined are not supported in date constructor at calcAge (calories:2:41) let birth=new Date(rawBday);let now=new Date();let diffInDays=(now-birth)/8... ^ at calcBMR (calories:3:93) ...=calcAge(myProfile.birthday);if(age<18){if(myProfile.gender!=undefined&&... ^ at intermittentBMRUpdate (.boot0:30:140) ...calModule.calcBMR(myProfile)*((now-lastBMRWrite)/60000));cal... ^ at .boot0 (.boot0:32:512) ...()});intermittentBMRUpdate();; ^

If so we should make this not happen some way. Either by using some default value somewhere or something. Not sure what's the best solution.

Should we catch the error and display a prompt about entering info in myprofile? From the prompt the user could be directed to the myprofile app via a positive action button.

Should we catch the error and display a prompt about entering info in myprofile. From the prompt the user could be directed to the myprofile app via a positive action button.

That sounds really nice actually - I'll get on that

thyttan · 2026-02-06T20:21:20Z

apps/calories/lib.js

+// returns cals/minute
+exports.calcBMR=function(myProfile){
+  let bmr=0;
+  let weight = myProfile.weight;


I get this error, probably since I haven't added any info to myprofile. Either we try to make sure the user have already entered info there. Or we nudge the user to add their weight. And/or add some default average value. What do you think?

> {"t":"act","stp":0,"hrm":0,"mov":175,"act":"UNKNOWN"} Uncaught Error: Calories: Not enough myProfile data to calculate! at calcCalories (calories:10:234) ...yProfile data to calculate!);}let weight=myProfile.weight;let age=... ^ at .boot0:32:13 }),myProfile)if(!cd)return;calData.activeCaloriesBurned+=cd.activeC... ^

I think this may be the best solution as of now? I feel like nudging the user to add certain elements means we need several checks that are separate for each element. I've added a table in the README for all the required fields, so if the user sees it, they can quickly check the readme/update the fields that are missing that way. Wdyt?

Good idea adding to the readme!

I think we can also do the same thing with catching the error and presenting the user with a prompt like suggested for that other error.

Yep, sounds good! We'll just have one prompt then, that says Not enough myprofile data, and then prompts to open the app settings?

Yeah I think that's good :)

Just committed, check it out!

apps/calories/app.js

thyttan · 2026-02-06T20:27:55Z

apps/myprofile/settings.js

-    });
+    };
+
+  menu[/*LANG*/`Resting HR: ${myprofile.restingHrm?myprofile.restingHrm:"--"}`]=RHRReading;


Not sure how best to handle but just looking in the settings page it looks weird having a "HR min" entry and a "Resting HR" entry. Even more so when they don't show the same number.

Would it be better if we do the full names like Minimum HR, Resting HR, Maximum HR?

I think you elaborated on this somewhere - could you link me to that thread? 🙏🙂

Huh, I don't think I did at all... But will that make it any better in your eyes if we did do the full name?

It was actually on this PR, sorry :p

#4142 (comment)

Could we change this a bit? I think it would be better if we just kept the one field 'HR min' and then have the resting heart rate measurement set the 'HR min' value once it finishes. That way we don't introduce a new store of the same data we already keep in the 'HR min' entry.

My suggestion in points:

Rename the 'Resting HR: xx' entry to 'Take resting HR' or similar.

Move that entry up so it's just below the 'HR min' entry.

Make the now renamed 'Take resting HR' entry update the 'HR min' fields value.

Update other files and readme to accommodate this change.

Ah - sorry, I think I had described Resting HR as the same as minimum hr for simplicity, but in reality, minimum HR is the absolute lowest your heart can go, while resting HR is bpm while your body is resting, which might be used differently. I would rather keep both because they can be slightly different, and specifically for formulas that need accuracy I don't think we should change it - would it be better if we kept it in a submenu instead with max hr, min hr and resting hr?

Can you give a source for there being that distinction? When I searched they seemed to be synonymous.

... Or rather: Resting heart rate seems to be the established term and 'Min HR' is just what we happened to call it on the Bangle.

apps/calories/README.md

thyttan · 2026-02-13T11:01:29Z

apps/myprofile/settings.js

          } else {
            const age = (new Date()).getFullYear() - date.getFullYear();
-            const newMaxHRM = 220-age;
+            const newMaxHRM = Math.round(208-0.7*age);


Do you have a source saying the new calculation is actually better/more accurate?

There are many, one I found is this

Ok, thanks. That page does not say explicitly that it's proven to be better. But it's good enough I think. Maybe we put that web adress in a comment at the end of the line?

apps/calories/README.md

Added prompt to set MyProfile data if missing for calorie calculations.

thyttan · 2026-02-27T12:24:21Z

Should we try to get this one over the finish line? I'll probably have some time to look closer again sunday morning :)

RKBoss6 · 2026-02-27T13:12:33Z

Yes, that sounds good! I won't have that much time to do it for a while, but I can take a look at it in bits and pieces and get it done gradually :)

thyttan · 2026-02-27T13:24:51Z

Ok, no stress 🙂

RKBoss6 · 2026-03-03T13:48:24Z

@thyttan do you happen to have another smartwatch lying around that can track calories already? I want to compare the accuracy of the tracker, so I will wear both for a day and see the difference in calories, with an old garmin lying around. If you can, can you do the same? That way we can test for different ages, values, etc...

thyttan · 2026-03-03T13:50:57Z

Nope, don't have a Gramin or similar I'm afraid.

RKBoss6 · 2026-03-03T15:32:04Z

Ok, no worries! I'll collect some data to see if it's accurate

thyttan · 2026-03-04T22:02:03Z

apps/calories/lib.js

+
+  // Validate heart rate
+  if (!hr || hr < 40 || hr > myProfile.maxHrm) {
+    throw new Error("Invalid or missing heart rate data");


Just got this error message:

| __|___ ___ ___ _ _|_|___ ___ | __|_ -| . | _| | | | | . | |____|___| _|_| |___|_|_|_|___| |_| espruino.com 2v29.17 (c) 2025 G.Williams >��OK > {"t":"act","stp":46,"hrm":74,"mov":276,"act":"UNKNOWN"} {"t":"status","bat":13,"chg":0} {"t":"act","stp":8,"hrm":0,"mov":172,"act":"UNKNOWN"} Uncaught Error: Unhandled promise rejection: Error: Invalid or missing heart rate data at calcCalories (calories:11:455) ... or missing heart rate data);}let ageMultiplier=1;if(age<18){age... ^ at .boot0:32:13 }),myProfile)if(!cd)return;calData.activeCaloriesBurned+=cd.activeC... ^ >

HRM was off in health app.

So maybe if the error is triggered the app should look at health settings json to see if HRM is off and if so suggest to turn it on?

But also, does the calories app fall back to calculating without hrm data? If not maybe that should be added?

thyttan · 2026-03-04T22:05:26Z

apps/calories/lib.js

+    throw new Error("Invalid or missing heart rate data");
+  }
+
+  // Age-adjusted MET values for better accuracy across age groups


I'd like to read a source on age-adjusting metabolic rate values. Do you have one?

Actually I'm not sure - I ran it through AI to see if it would scale appropriately for different ages, and it told me this. I'm not sure whether it makes a difference, as I haven't tested this fully yet, but I'll get to testing hopefully soon.

Ok. If you don't find a source backing it up I think we should pull it out and not have age affect the calculation.

I'll wait to pull it out until after i've tested with a garmin, so if any formula changes need to be made, I'll do it all in one swoop :)

What kind of changes are you thinking about doing if the Garmin and this app show very different values?

There are many ways of getting calories, through RHR, or through steps and hr alone, so I'll look into those and see which performs better

Just noting that by better you mean 'more like Garmin'. Which is probably an ok comparison given they have more resources to get it right. But at the same time they don't represent some perfect ground truth (which we'll never have of course).

thyttan · 2026-03-07T08:52:38Z

It seems the calories goal drop down notification will persist indefinitely if not dismissed. I think it would be good if it timed out after a minute or two, or even just 10 seconds. What do you think?

RKBoss6 and others added 30 commits January 23, 2026 19:09

Add Resting Heart Rate functionality to health app

0a929ba

Create boot.js

cc50039

add base readme

9f68705

Create lib.js

b9d013b

Refactor calorie tracking and data saving logic

2a7994f

add base clockinfo

2e9574f

Create metadata.json for Calorie Tracker

1a144d2

Add metadata for Calorie Tracker application

Add calorie calculation formula to README

78e06bc

Expanded the README to include the calorie calculation formula and its components, enhancing user understanding of the app's functionality.

Add files via upload

2870e62

Create app-icon.js

5ff35f7

Implement calorie tracking display and logic

4761d4d

Refactor calorie event handlers for efficiency

ba759ec

Refactor global calories initialization

7dbf791

refactor to calculate bmr separately for smoother data resolution, up…

d719101

…date boot.js to match

Rename provides_features to provides_modules

e7562c5

Create ChangeLog

2b71130

Add health integration, bump myprofile and health versions, add scree…

ae699af

…nshot for health, add gender for myprofile

Improve heart rate calculations in settings.js

b6ef7b8

Refactor logic for setting resting heart rate and round max heart rate calculation.

Update heart rate and add gender in README

b5e6400

Update ChangeLog with new gender setting

ebb051b

Fix gender check condition in BMR calculation

9a92649

Add RHR measurement instructions to README

72ad0eb

Added instructions for taking Resting Heart Rate (RHR) measurements, including tips for optimal conditions and app navigation.

Update metadata.json

ec638ce

Add integratio within health

4e2d4a1

Merge branch 'caloriesApp' of https://github.com/RKBoss6/BangleApps i…

c0ba44d

…nto caloriesApp

Update health dependency type to app

30a120c

Add app overhaul with multi-page views, boot.js saves day summary and…

d1730b9

… refactored code

Merge branch 'caloriesApp' of https://github.com/RKBoss6/BangleApps i…

c45c588

…nto caloriesApp

Add settings menu for calorie tracking

5f0b6e3

Add settings files to metadata.json

89ac589

thyttan reviewed Feb 6, 2026

View reviewed changes

RKBoss6 added 7 commits February 6, 2026 16:17

Update README with setup and formula details

a9a4669

implement @thyttan's reviews for myProfile

8670717

Add @thyttan's suggestions

8d589ee

add semicolons back after formatter error

b52ef3c

fix trailing comma

8142041

Add max, settings and max BMR calculation to clkinfo.js

6c6c90d

Update settings.js

5093051

thyttan reviewed Feb 13, 2026

View reviewed changes

apps/calories/README.md Outdated Show resolved Hide resolved

thyttan reviewed Feb 13, 2026

View reviewed changes

apps/calories/README.md Outdated Show resolved Hide resolved

thyttan added 2 commits February 13, 2026 11:57

calories: avoid horizontal scroll by shortening code block

3d7882e

calories: avoid horizontal scrolling by shortening code block (2)

4f3af63

thyttan reviewed Feb 13, 2026

View reviewed changes

apps/calories/README.md Show resolved Hide resolved

apps/calories/README.md Show resolved Hide resolved

thyttan and others added 5 commits February 13, 2026 13:27

calories: try to fix readme formatting

a8d13d3

calories: try to fix readme formatting (2)

994f8bd

calories: try to fix readme formatting (3)

b2fae68

Merge branch 'espruino:master' into caloriesApp

f1fbeab

Implement prompt for missing MyProfile data

8345f3c

Added prompt to set MyProfile data if missing for calorie calculations.

thyttan reviewed Mar 4, 2026

View reviewed changes

Conversation

RKBoss6 commented Jan 25, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

thyttan commented Feb 6, 2026

Uh oh!

RKBoss6 commented Feb 6, 2026

Uh oh!

thyttan left a comment

Choose a reason for hiding this comment

Uh oh!

Uh oh!

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Choose a reason for hiding this comment

Uh oh!

thyttan Feb 12, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Uh oh!

Uh oh!

Choose a reason for hiding this comment

Uh oh!

thyttan Feb 13, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Choose a reason for hiding this comment

Uh oh!

thyttan Feb 13, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Choose a reason for hiding this comment

Uh oh!

RKBoss6 Feb 13, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Uh oh!

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Choose a reason for hiding this comment

Uh oh!

thyttan Feb 11, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Uh oh!

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Choose a reason for hiding this comment

RKBoss6 commented Jan 25, 2026 •

edited

Loading

thyttan Feb 12, 2026 •

edited

Loading

thyttan Feb 13, 2026 •

edited

Loading

thyttan Feb 13, 2026 •

edited

Loading

RKBoss6 Feb 13, 2026 •

edited

Loading

thyttan Feb 11, 2026 •

edited

Loading

RKBoss6 Mar 18, 2026 •

edited

Loading

thyttan Mar 18, 2026 •

edited

Loading