Water Drink: an app to track your daily water intake

Water Drink (internal name "Hidratação Diária") is a mobile app I built with React Native and Expo to log and track water intake throughout the day, helping to reach a daily hydration goal.

The idea came from a simple, personal problem: remembering to drink water throughout the day without relying on manual notes or doing the math in your head.

Personalized onboarding

The first time the app is opened, the user goes through a quick questionnaire — sex, age range, and weight (optional) — used to automatically calculate a recommended daily goal, which can also be adjusted manually.

At this same stage, the user can already choose the favorite containers (cups, bottles, squeeze bottles) that will show up as shortcuts for everyday use.

Home screen

The main screen shows a circular indicator with the percentage and volume already consumed, the goal front and center, and quick-action buttons to log preset volumes with a single tap — plus a + Custom button for specific amounts.

Achievements and widget

A trophy system gamifies app usage (logging, goals reached, weekly streaks), and an Android widget lets you log water straight from the phone's home screen, without opening the app.

Stack

The project uses React Native + Expo, React Navigation, expo-notifications for scheduled local reminders, AsyncStorage for local data persistence, and react-native-android-widget for the Android widget.

For a detailed look at each feature, check out the Water Drink deep-dive post or the source code on GitHub.