Build Study Report Section for Flutter App (with Firebase Firestore Integration) -- 2

I need a Study Report Section developed for my existing Flutter app. This will replace the current basic report screen with an advanced, interactive version.

Features Required:

Pie Chart: Display study hours divided by subjects

Bar Graph: Show weekly study progress (hours per day)

Calendar View: Highlight monthly study sessions

4 Stat Cards:

1. Total studied hours


2. Most studied subject


3. Earliest start time


4. Latest finish time



Live Firestore Integration: Data should update instantly when a user finishes/stops a timer (real-time streaming from Firestore)


Requirements:

Code must be clean, bug-free, and modular

Easy to integrate into my existing Flutter app

Must work seamlessly with Firebase Firestore

Delivery of both source code and a short implementation guide (README)


What to Provide in Your Bid:

1. Estimated cost for this task


2. Expected delivery timeline


3. Relevant Flutter + Firebase experience (portfolio/examples)



Notes:

Firestore database structure and sample data will be provided.

I prefer developers with prior experience building charts and analytics dashboards in Flutter.