Water Reminder – Daily Hydration Tracker & Smart Alarm App for Android

Water Reminder is a full-featured, beautifully designed Android application that helps users stay properly hydrated throughout the day. The app combines a smart, science-backed goal recommendation engine with flexible reminder scheduling, animated circular progress, a home-screen widget, and a rich statistics screen — all packaged in clean, maintainable Java code following Google’s recommended MVVM architecture.

Upon first launch, users are guided through a smooth onboarding flow that collects their name, gender, age, weight, height, activity level, and local weather conditions. The app then calculates a personalised daily water intake goal in real time using an evidence-based formula and lets the user fine-tune it with a slider before saving.

The main dashboard presents a large animated circular progress ring showing how much of the daily goal has been reached, a horizontal scrollable container picker (glass, cup, bottle, mug, flask, custom), a live log of every drink recorded today with swipe-to-delete, a streak card showing consecutive days of goal completion, and a motivational message that updates dynamically throughout the day.

The Reminders screen lets users both manually create individual alarms (with custom label, time, and amount) and auto-generate a full schedule derived from their saved wake-up time, bedtime, and preferred interval — a powerful one-tap setup that eliminates tedious manual entry. All alarms survive device reboots via a BootReceiver and are delivered as high-priority notifications with inline Drink Now and Skip action buttons that log or dismiss the entry without opening the app.

The History screen shows interactive bar charts (via MPAndroidChart) for weekly, monthly, and yearly periods, with goal-achieved bars highlighted in a distinct colour and summary statistics (average, maximum, minimum, and total intake) shown below the chart.

A home-screen widget shows the current intake, goal, percentage progress bar, and a one-tap Drink button — all updated in real time from the Room database without opening the app.