HEALTH & FITNESS FLUTTER & DART

Personal Fitness

Personalized workout routine manager, set/rep logger & health analytics application.

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Platform

iOS & Android

Role

Lead Developer

Timeline

2024 - 2025

Architecture

Provider & Offline-First

Tech Stack & Architecture

Built with Flutter for high performance, smooth animations, and reliable offline local data storage.

Framework & Core

Flutter 3.x Dart 3.x Material Design 3

State Management & Architecture

Provider Pattern MVVM Architecture Reactive Rest Timers

Local Storage & Persistence

Hive DB SQLite SharedPreferences

Development & Analytics

FL Chart Visualizations Figma UI/UX Git & GitHub

Project Overview

Personal Fitness is an offline-first workout tracking mobile application created to help gym-goers, athletes, and fitness enthusiasts log their daily training sessions, customize weekly routine splits, monitor volume progression, and achieve long-term physical goals with zero distractions.

The Challenge

Most fitness apps require constant internet connectivity, suffer from sluggish UI in basement gyms, and lock essential routine creation features behind expensive subscriptions.

The Solution

Engineered an ultra-fast, 100% offline Flutter app using Hive key-value persistence, featuring instant set/rep logging, built-in rest intervals, and clean visual progress charts.

Key Application Features

Routine Builder

Create custom splits including Push-Pull-Legs, Upper-Lower, or full-body programs tailored to individual goals.

Instant Set Logger

Record weights, completed reps, and RPE with one-tap increments and automatic rest countdown vibration.

Exercise Database

Organized by muscle group (Chest, Back, Shoulders, Legs, Core) with form cues and previous personal bests.

Volume Analytics

Interactive weekly training volume and bodyweight graphs to ensure continuous progressive overload.

100% Offline First

No network connection required in gyms; lightning-fast read/write access via embedded Hive binary storage.

High-Contrast Dark UI

Sleek dark theme optimized for OLED screens and low-light training rooms to reduce eye strain and battery usage.

Engineering Highlights

Sub-millisecond Storage: Employed Hive NoSQL database for rapid serializations of complex workout hierarchies and exercise logs without database lock contention.
Background Timer Synchronization: Robust timer controller that maintains accurate countdowns even when the app is minimized during workout rest intervals.
State Modularity: Clean separation of WorkoutProvider and RoutineProvider, preventing unnecessary rebuilds of active input widgets.