Care

A simple way to look after your body, every day.

Overview

Care is a single-file web application that helps track daily health metrics including:

• Nutrition: Calories, protein, carbs, fat, and sugar intake
• Workouts: Exercise type, duration, volume, and personal records
• Weight: Progress tracking toward goal weight
• TDEE & Deficit: Daily energy expenditure and caloric deficit calculations

Getting Started

Open index.html in any modern browser. No server or build process required.

Data is stored in your browser's localStorage and persists between sessions.

Data Collection Workflow

Using Claude for Data Entry

The primary workflow involves conversing with Claude to log meals and workouts:

1. Log meals naturally: Tell Claude what you ate throughout the day

   • "I had eggs and toast for breakfast, a chicken salad for lunch..."
   • Claude calculates macros and formats the data

2. Log workouts: Describe your exercises

   • "I did 3 sets of 10 lat pulldowns at 110 lbs, then 25 minutes of cycling..."
   • Claude tracks volume, PRs, and calories burned

3. Get structured JSON: At the end of the day or week, ask Claude to output the data in the app's JSON format

4. Import into Care: Use the + button to paste the JSON data

Managing Imports

Each import is tracked with a name and date range. Use the Manage tab in the import modal to view or delete previous imports.

Sample Data

Import sample-data-full.json to explore the app with demo data covering several months of tracking.

Manual Tracking

You can also manually track by:

1. Exporting current data (export button in header)
2. Editing the JSON file directly
3. Re-importing the updated data

Data Structure

Each day entry includes:

{
  "date": "2026-01-10",
  "dayOfWeek": "Friday",
  "nutrition": {
    "calories": 2490,
    "protein": 158,
    "carbs": 307,
    "fat": 71,
    "sugar": 130
  },
  "workout": {
    "type": "Day B",
    "duration": 60,
    "caloriesBurned": 456,
    "volume": 9530,
    "exercises": [
      {"name": "Lat pulldown", "weight": 110, "reps": 10, "sets": 3, "pr": true},
      {"name": "Cycling", "distance": 3.48, "duration": 25, "calories": 456}
    ]
  },
  "tdee": 2856,
  "deficit": -366,
  "notes": "Best protein day! Lat pulldown PR!"
}

Features

• Calendar view: Navigate by day, week, or month
• Progress charts: Visualize trends over time
• Workout analysis: Track volume, PRs, and muscle group distribution
• Weight tracking: Monitor progress toward goal weight
• Customizable targets: Set personal macro and calorie goals
• Import/Export: Full data portability via JSON, with import tracking and management
• Offline-first: Works without internet, data stays local

Tech Stack

• Vanilla JavaScript (no build step)
• Tailwind CSS (via CDN)
• Chart.js for visualizations
• Open Runde font
• localStorage for persistence