Productivity / Habit Tracking

Habit Tracker 2026

Flutter Application

Overview

Habit Tracker 2026 helps users build routines by turning habits into scheduled tasks, each with an icon, frequency, difficulty, and reminder, and then showing honest progress through completion rates and weekly performance charts.

The Challenge

Habit apps live or die on scheduling logic: a single task model had to represent daily, weekly, monthly, and one-time habits, surface the right tasks as past, current, or upcoming on any given day, and feed accurate completion data into the analytics charts.

My Role

I built the application end-to-end with Flutter and Firebase, covering authentication, the task and scheduling model, notification reminders, and the analytics layer.

Technical Approach

Implemented secure Firebase authentication for sign-up, login, and sign-out, with each user's tasks scoped to their account.
Modeled tasks with title, description, icon, frequency, and difficulty, letting one schema drive daily, weekly, monthly, and one-time habits.
Built the home screen around time buckets (past, current, and upcoming tasks) so users always see what needs doing now.
Added local reminder notifications per task, plus a test-notification option so users can confirm reminders work on their device.
Built analytics with total vs completed tasks, completion rate, a last-7-days performance chart, and a last-4-weeks activity chart, alongside date-based stats.
Added dark mode and a user profile section for a complete, polished experience.

Technical Challenges & Solutions

Four frequency types (daily, weekly, monthly, once) had to resolve into a single 'what's due today' view without duplicating task records per occurrence.

Solution: Stored one task with a frequency rule and computed occurrences at read time, bucketing them into past, current, and upcoming for the home screen.

Analytics needed per-day completion history, but storing only a task's latest status would lose the data behind the 7-day and 4-week charts.

Solution: Recorded each completion as a dated entry, so completion rate and both charts derive from the same history without extra tracking logic.

Technical Architecture

A Flutter client on Firebase Auth and Firestore, where each task stores its frequency rule and completion records as dated entries rather than a single boolean, letting the same data answer today's checklist, the 7-day performance chart, and the 4-week activity chart without separate bookkeeping. Notifications are scheduled locally from the task's frequency and reminder time, and theming supports light and dark mode across the app.

Outcome

Delivered a complete cross-platform habit tracker with secure accounts, flexible scheduling, working reminder notifications, and analytics that give users a clear picture of their consistency over days and weeks.