# Habit Tracker

A simple habit tracker that runs entirely in your web browser. No installation, no account, no internet connection needed.

## What it does

- **Add habits** – type a habit (like "Drink water" or "Read 10 pages") and click **Add habit**.
- **Check them off** – click **Mark done today** each day you do the habit. Click it again to undo.
- **See your streak** – each habit shows how many days in a row you've kept it up. If you haven't checked it off yet today, your streak from yesterday still counts until the day is over.
- **30-day grid** – a row of squares shows the last 30 days (oldest on the left, today on the right). Green means done. Click any square to fix a day you forgot to mark.
- **Rename or delete** habits with the buttons next to each one.

## How to start it

1. Download or copy the `index.html` file to your computer.
2. Double-click it. It will open in your web browser (Chrome, Firefox, Edge, Safari, etc.).

That's it.

## Where your data is kept

Your habits are saved automatically in your browser's own storage on your computer. Nothing is sent anywhere.

Keep in mind:
- Your habits are only in the browser you use. If you open the file in a different browser or on another computer, you'll start fresh.
- Clearing your browser's history or site data may erase your habits.