Flutter Developer for Android Habit Tracking App

I am looking for an experienced Flutter developer to build an Android application for creating and tracking daily habits.

Main features:

- creating, editing, pausing and archiving habits;
- habit categories, icons and colors;
- different schedules and frequencies;
- simple completion goals and measurable goals;
- a daily habit list with progress tracking;
- habit history, calendar, streaks and statistics;
- local reminders;
- user accounts with email and Google sign-in;
- Firebase data synchronization;
- Polish and English languages;
- light and dark themes;
- free and Premium features;
- subscriptions through Google Play.

Preferred technologies:

- Flutter and Dart;
- Firebase Authentication and Firestore;
- local notifications;
- Google Play Billing or RevenueCat.

The application is intended only for Android. An iOS version is not included in the project.

The exact scope will be agreed with the selected developer. The project may be divided into milestones. After completion, I expect to receive the complete source code, setup instructions and intellectual property rights to the delivered work.

Please include in your proposal:

- examples of relevant mobile applications;
- estimated price and delivery time;
- proposed milestones;
- a clear description of what your price includes.

For general context, applications in this category include Habit Tracker by Qbito, HabitNow Daily Routine Planner and Loop Habit Tracker. These are general references only and should not be copied.