Hydration Tracker

A daily water intake tracker that helps you build and maintain healthy hydration habits. Log every drink, set personalized daily goals, check your progress throughout the day, and review weekly summaries — all from the command line with local-only data storage.

Commands

Command	Description
`drink [ml]`	Log water intake in milliliters (default: 250ml). Shows running total and goal progress with celebration when goal is reached
`cup`	Quick-log a cup of water (250ml) — shortcut for `drink 250`
`bottle`	Quick-log a bottle of water (500ml) — shortcut for `drink 500`
`today`	Display today's total intake vs. daily goal, with remaining amount or goal-reached indicator
`goal [ml]`	Set your daily hydration goal in milliliters (default: 2000ml)
`check`	Check if you're on track — compares current intake against expected intake based on time of day
`week`	Show a 7-day hydration summary with daily breakdowns, weekly total, and daily average
`history [n]`	Show hydration history for the last N days (default: 7, max: 30)
`stats`	Display overall statistics — total days tracked, total intake, and average daily intake
`remind`	Get a random hydration tip (e.g., "Drink a glass of water before each meal")
`info`	Show version info (v1.0.0)
`help`	Show all available commands with usage examples

Data Storage

Data directory: ~/.water_reminder/
Intake data: data.json — JSON object mapping dates (YYYY-MM-DD) to cumulative daily intake in ml
Goal config: goal.json — stores your current daily goal (default: 2000ml)
Max history: 30 days of lookback for the history command
All data is stored locally in JSON format; no external services, accounts, or network access required

Requirements

Bash 4+
Python 3 (standard library only — used for JSON read/write)
Standard POSIX utilities (date, seq)
No API keys or external dependencies

When to Use

Building a daily hydration habit — log each drink throughout the day and let the progress tracker keep you motivated with goal-reached celebrations
Checking mid-day progress — use check to see if your intake is on track relative to the time of day, so you can catch up before evening
Reviewing weekly trends — run week to see a 7-day summary with emoji indicators showing which days you hit your goal
Adjusting your hydration goal — use goal to increase or decrease your daily target based on activity level, weather, or health needs
Getting gentle reminders — run remind for evidence-based hydration tips to keep healthy habits top of mind

Examples

# Log 300ml of water
hydration-tracker drink 300

# Quick-log a cup (250ml)
hydration-tracker cup

# Quick-log a bottle (500ml)
hydration-tracker bottle

# Check today's progress
hydration-tracker today

# Set a custom daily goal of 2500ml
hydration-tracker goal 2500

Example Output

$ hydration-tracker drink 300
Logged 300ml. Today's total: 1200ml / 2000ml.
Almost there! Keep going!

$ hydration-tracker today
Today's intake (2026-03-18): 1200ml / 2000ml
Remaining: 800ml

$ hydration-tracker week
--- Weekly Hydration Summary ---
2026-03-18: (1200ml / 2000ml) 💧
2026-03-17: (2100ml / 2000ml) 🎉
2026-03-16: (1800ml / 2000ml) 💧
...
Weekly total: 12300ml
Daily average: 1757ml (Goal: 2000ml)

$ hydration-tracker remind
💧 Hydration Tip: Drink a glass of water before each meal.