Features

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Four pillars of wellness

Vitu organizes your health journey around four essential pillars, each designed to help you build sustainable healthy habits.

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Nutrition

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AI-powered food analysis

Take control of your nutrition with intelligent food recognition powered by Google Gemini AI. Simply capture a photo of your meal to get instant nutritional analysis. How it works:

1. Capture your meal - Choose between camera or gallery to select a food photo
2. AI analysis - Gemini identifies the dish and estimates nutritional content
3. View insights - See calories, proteins, carbohydrates, and fats in an interactive pie chart
4. Review history - Access your last 8 food photos for quick re-analysis

Nutritional breakdown:

• Calories - Total energy content in kcal
• Proteins - Essential for muscle building and repair
• Carbohydrates - Your body’s primary energy source
• Fats - Important for hormone production and nutrient absorption

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Personalized recipe recommendations

Receive daily recipe suggestions tailored to your dietary needs and preferences. What you get:

• 3 daily recipes - Varied, balanced meal ideas generated fresh each day
• Time estimates - Know how long each recipe takes to prepare
• Difficulty ratings - Choose recipes that match your cooking skills
• Health rationale - Understand why each recipe is recommended for you
• Complete ingredients - Full shopping list for each recipe
• Nutritional estimates - Calories and macros for every recipe

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Exercise

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Smart step tracking

Automatically count your steps throughout the day with intelligent activity detection that distinguishes between walking, running, and vehicle movement. Smart features:

• Automatic counting - No need to manually start or stop tracking
• Activity detection - Recognizes walking vs. running patterns
• Vehicle filtering - Stops counting when you’re traveling faster than 15 km/h
• Daily persistence - Your step count is saved and persists throughout the day

How it detects movement:

• Uses your device’s accelerometer to measure movement patterns
• Combines GPS data to calculate speed and filter out vehicle travel
• Applies activity-specific thresholds to distinguish walking from running
• Buffers step data and saves periodically to preserve battery life

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Hydration

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Simple water intake tracking

Stay hydrated with effortless water consumption tracking and visual progress monitoring. Quick-add buttons:

• +100 ml - Small sips throughout the day
• +250 ml - Standard glass of water
• +500 ml - Large water bottle

Smart daily goals: Your hydration target is automatically calculated based on:

• Weight - Approximately 35 ml per kg of body weight
• Age - Adjusted for children (under 14 years) and seniors (65+ years)
• Gender - Males receive an additional 200 ml recommendation
• Safety limits - Goals are clamped between 1,200-4,500 ml for safety

Progress visualization:

• Circular progress - Real-time percentage of daily goal completed
• Weekly chart - Track hydration consistency over the past 7 days
• Daily reset - Progress starts fresh at 0% each morning
• Total tracking - See exactly how many ml you’ve consumed

Data storage:

• Individual log entries stored in hydration_logs
• Daily summaries in daily_hydration_summary
• All entries timestamped for detailed analysis

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Sleep

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Automatic sleep detection

Let Vitu track your sleep automatically without any manual input. Sleep detection works intelligently in the background. How automatic detection works:

1. Time window - Only detects sleep between 7:00 PM and 7:00 AM
2. Screen state - Monitors when your device screen turns off
3. Grace period - 10-minute margin to avoid counting short screen-off periods
4. Duration calculation - Measures total time from sleep start to wake
5. Quality assignment - Automatically rates sleep quality based on duration

Sleep quality ratings:

• Less than 6 hours - 2 stars (insufficient sleep)
• 6-8 hours - 4 stars (good sleep)
• More than 8 hours - 5 stars (excellent sleep)

Sleep insights:

• Weekly chart - Visualize your sleep duration over the past 7 days
• Sleep history - Review individual nights with start time, end time, and duration
• Quality tracking - Monitor how well you’re sleeping over time
• Duration summaries - See total hours slept each night

Technical implementation:

• Uses Flutter’s WidgetsBindingObserver to detect app lifecycle changes
• Monitors paused (screen off) and resumed (screen on) states
• Clips sleep segments to valid time windows (only counts time within 7pm-7am)
• Consolidates multiple wake/sleep cycles into single night summaries
• Stores data in daily_sleep with format userId_YYYY-MM-DD

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Settings and customization

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Personalize your experience

Make Vitu truly yours with extensive customization options. Appearance settings:

• Theme - Switch between light and dark mode
• Seed color - Choose your preferred accent color throughout the app
• Font family - Select from multiple typography options (default, serif, and more)

Personal data:

• Update your name, age, height, weight, and gender
• Modify your email address
• Change your password securely

Account management:

• Log out - Sign out and return to login screen
• All settings are stored locally in user_settings database
• Preferences are tied to your user account

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Privacy and data storage

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Your data stays on your device

Vitu is built with privacy as a core principle. All your health data is stored locally using Hive NoSQL database. Local storage boxes:

• users - Profile data (name, email, physical stats)
• user_settings - Theme preferences and custom goals
• daily_exercise - Step counts and activity data
• hydration_logs - Individual water intake entries
• daily_hydration_summary - Daily totals and percentages
• daily_sleep - Sleep sessions with quality ratings

Data organization:

• Most entries use composite keys: userId_YYYY-MM-DD
• This pattern allows easy daily data retrieval
• All data is tied to your user account
• No external servers or cloud sync

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Cross-platform availability

Vitu is built with Flutter, providing native performance across all major platforms:

• Android
• iOS
• Windows
• Linux
• macOS

Enjoy the same beautiful Material 3 interface and seamless experience regardless of which device you use.