Fat Check

Fat Check is a no-build, one-page calorie tracker. It feels like a small mobile app and stores data in a BitStore bucket configured locally in each browser.

Live app:

https://fatcheck.mrcheng.se/

Features

• Add calorie entries from a mobile-style UI.
• Track the current Monday-Sunday week.
• Set a daily intake goal.
• Set a daily burnrate.
• Show daily calorie bars, cumulative weekly intake, daily goal, and weekly goal in one chart.
• Estimate weekly weight change from burnrate and calories eaten.
• Reset calorie entries with a reset confirmation.
• Keep BitStore bucket slug and write key local to the browser.

BitStore Setup

Open the key icon in the app header and save:

• Bucket slug, for example fat-check
• Write key from BitStore

The app reads from the saved bucket slug:

https://bitstore.mrcheng.se/api/buckets/{your-slug}/records

The bucket slug and write key are not committed to this repository. A public link to the app will not show private bucket data unless that browser has a bucket slug saved locally.

BitStore guide:

https://bitstore.mrcheng.se/HowTo

Data Format

Daily calorie totals are stored as one value per day:

g4c:1200

The part before : is a compact day code. The part after : is that day's calorie total. Adding more calories on the same day updates the existing daily record instead of creating another calorie record.

App settings are stored in the same bucket with short prefixes:

• g1200 means daily intake goal is 1200 kcal/day.
• b2000 means burnrate is 2000 kcal/day.

BitStore values are limited to 8 characters, so settings use compact records.

Weight Math

Burnrate is treated as the zero line.

weekly deficit = burnrate * 7 - calories eaten this week
weight change = weekly deficit / 3500

Example:

burnrate = 2000 kcal/day
weekly burnrate = 14000 kcal
eaten this week = 5700 kcal
deficit = 8300 kcal
estimated weightloss = 2.4 Kg

Development

This is a static site:

• index.html
• styles.css
• app.js
• assets/logo.svg

Run locally with any static server:

python -m http.server 4173 --bind 127.0.0.1

Then open:

http://127.0.0.1:4173/

Production is served as a static site from the Oracle VM through Caddy.