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1. Getting Started

Creating Your Account

Download Lejavu from Google Play and create your account using your email address. You can sign in with a traditional password or use our Magic Link system — we'll send a secure login link directly to your inbox. No password to remember.

The Onboarding Wizard

After signing up, you'll walk through a personalized 8-step onboarding wizard that tailors the entire app to you:

1

Welcome — Introduction to Lejavu's core philosophy.

2

Your Name — Set your display name (up to 20 characters).

3

Your Goal — Choose: Lose Weight, Gain Muscle, Maintain Weight, or Get Healthier.

4

Body Stats — Enter your height, weight, age, and gender. Supports both metric and imperial units.

5

Daily Goals Preview — Lejavu calculates your personalized calorie, protein, carb, fat, and water goals using the scientifically-backed Mifflin-St Jeor equation. Review your targets before continuing.

6

Stay on Track — Enable optional local reminders for meals, water, sleep, and streak protection. All notifications stay on your device — nothing is sent to external servers.

7

Create Your Avatar — Generate a unique AI-powered avatar to represent you in the app and on the leaderboard. This step is completely optional.

8

You're Ready! — Dive into your personalized dashboard.

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2. Understanding the Dashboard

Your Home screen is the command center. At a glance, you'll see:

Calorie Ring — A color-coded circular progress indicator showing how much you've consumed vs. your daily goal. The ring changes through 6 color zones: blue (just starting) → teal → green → lime (on target) → amber (warning) → red (over budget).
Macro Bars — Horizontal progress bars for Protein, Carbs, Fat (and Alcohol when consumed), showing grams eaten vs. your personalized targets.
Today's Meals — A collapsible timeline of everything you've logged today, grouped by meal type. Tap any meal category to jump to the Food tab.
Water Intake — A collapsible widget showing your hydration progress with quick-add buttons (150ml to 1L).
Today's Exercises — A collapsible summary of your workout activity for the day.
Sleep Log — Quick access to log your sleep duration and quality for the day.
Lifestyle Trackers — Optional cards for mood, alcohol, tobacco, socializing, family time, meditation, and caffeine — each individually toggleable from settings.
Streak Badge — Your current consecutive-day logging streak. Tap it to see how streaks work.

The Date Strip

At the top of the screen, you'll see a horizontal scrollable date band spanning the last 60 days. Tap any date to view historical data. There's also a 📅 calendar icon to jump to any specific past date. The selected date syncs across all tabs instantly.

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3. Nutrition & Meal Tracking

Lejavu gives you 4 powerful ways to log your meals — choose whichever is fastest for you:

📸 AI Photo Scan

Take a photo of your food (or pick one from your gallery) and let AI instantly analyze it. Within seconds, you'll get:

A short title for the meal (e.g., "Grilled Chicken Salad")
Individual detected food items with per-item nutrition
Total calories, protein, carbs, fat, and estimated serving size
A confidence indicator showing how certain the AI is

You can chat with the AI after scanning to refine the results — for example, "add more rice" or "remove the dressing." You can also edit the meal title and choose which meal category (Breakfast, Lunch, Dinner, Snack, Dessert, or Drink) to save it under.

Optionally, toggle "Save to My Foods" to add the meal to your personal food library for quick logging next time.

Your photos are analyzed in-memory and immediately discarded — they are never stored on our servers.

💬 Describe It (Text AI)

Don't have a photo? Just type what you had in natural language — for example:

"I had a chicken wrap with hummus and a side of fries"
"Two eggs, toast with butter, and orange juice"
"A large latte with oat milk"

The AI understands natural language and will estimate the full nutritional breakdown. If your description is vague, it will ask clarifying questions (e.g., "What size was the coffee?") before generating results.

📚 My Foods

Build your own personal food library. Create entries with custom nutrition values and reuse them with one tap. Features include:

Name, category, serving size, and serving unit (g, ml, cups, pieces, etc.)
Full macro breakdown (calories, protein, carbs, fat, alcohol)
Adjustable serving size when logging — macros scale proportionally
Search and filter by meal category
Foods saved from AI scans appear here automatically

⚡ Quick Add

The fastest way to log: just enter a calorie number and go. Perfect for when you know the calories but don't need detailed tracking. Optionally add a name and macros (protein, carbs, fat). Preset buttons (100, 200, 300, 500, 700, 1000) make it even faster.

Six Meal Categories

Every food entry is categorized into one of six types: Breakfast 🥣, Lunch 🍱, Dinner 🍽️, Snack 🍿, Dessert 🍰, or Drink 🧃. This helps you see how your nutrition is distributed throughout the day.

The Food Tab

The Food tab shows all your logged meals for the selected date, grouped by category. Each entry displays its name, macros, and calorie count. You can delete any entry with a confirmation dialog. A summary bar at the top shows your daily totals.

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4. Water Intake Tracking

Staying hydrated is crucial. Lejavu calculates your daily water goal automatically based on your body weight (35ml per kg of body weight, with an activity-level bonus of up to 30%).

Log water with a single tap using preset buttons that match real-world containers:

150ml — Small glass
250ml — Standard glass
330ml — Can
500ml — Small bottle
750ml — Large bottle
1000ml — Full liter

Water quick-add buttons appear both on the Home dashboard and the Food tab. Each entry is timestamped and can be individually deleted. A progress bar shows how close you are to your daily goal.

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5. Workout & Exercise Tracking

Exercise Library

Lejavu comes pre-loaded with 156 system exercises across 5 categories:

Strength (76) — Bench Press, Deadlift, Squats, etc.
Cardio (20) — Running, Cycling, Jump Rope, etc.
Bodyweight (30) — Push-ups, Pull-ups, Planks, etc.
Sports (20) — Basketball, Swimming, Boxing, etc.
Flexibility (10) — Stretching, Yoga, etc.

Search and filter by category. You can also create custom exercises with a specific tracking type (reps & weight, reps only, duration, distance & duration, or duration only).

Logging Exercises

From the Workout tab, tap the + button to add exercises to your daily log. For each exercise, you'll see input fields tailored to its tracking type — for example, sets × reps × weight for strength exercises, or duration × distance for cardio.

Workout Templates

Create reusable workout templates ("Leg Day", "Morning Cardio", "Full Body") by combining multiple exercises with preset sets, reps, and weights. When you're ready to train, open a template and log the entire workout with one tap — or adjust values on the fly.

AI Workout Generator

Tell the AI your goal (e.g., "upper body strength workout, 45 minutes, intermediate level") and it will generate a complete workout plan with exercises, sets, reps, and recommended weights. You can log the generated workout immediately and optionally save it as a template.

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6. Body Metrics & Measurements

Track your physical progress over time with detailed body composition data:

Weight — Log regularly to track your progress, supports both kg and lbs
Body Fat % — Optional, enables fat mass calculations
Body Water % — Optional, tracks hydration at the tissue level

Computed Metrics

When you log a measurement, Lejavu automatically computes:

BMI — Body Mass Index with category label (Underweight → Obese)
BMR — Basal Metabolic Rate (calories burned at rest)
Fat Mass — How many kg/lbs of your weight is fat
Fat-Free Mass — Everything that isn't fat (muscle, bone, organs, water)
Skeletal Muscle Mass — Estimated using gender-specific BIA ratios
Body Water — Total water in kg/lbs

View your full measurement history with trend indicators showing whether metrics are going up, down, or staying stable.

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7. Sleep Tracking

Log your sleep duration and quality each day. Over time, you'll see patterns between your sleep habits and daily performance. One entry per day — if you need to update it, just tap to edit. Your sleep data feeds into the Insights charts for long-term trend analysis.

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8. Lifestyle & Mood Tracking

Lejavu goes beyond calories and workouts. Track 7 lifestyle metrics that affect your overall well-being:

😊 Mood — Rate your daily mood on a scale

🍺 Alcohol — Log drink count and type

🚬 Tobacco — Track smoking habits

👥 Socialized — Did you spend time with people?

👨‍👩‍👧 Family Time — Quality time with family

🧘 Meditation — Mindfulness and meditation sessions

☕ Caffeine — Coffee, tea, and energy drink intake

Each tracker can be individually enabled or disabled from your Profile settings. When all lifestyle trackers are turned off, the entire section hides automatically from the Home and Log screens — keeping your interface clean.

View history for any metric and spot correlations (e.g., "I sleep better on days I meditate").

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9. Insights & Analytics

The Insights dashboard turns your raw data into actionable trends. You get 7 interactive charts, each toggleable from a visibility filter dropdown:

🔥 Calorie Intake — Daily calorie consumption over 7, 30, or 90 days
🥧 Macro Breakdown — Protein, carbs, and fat lines plotted together over time
💧 Water Intake — Hydration consistency with daily totals
🏋️ Exercise Activity — Bar chart showing exercises logged per day
🧍 Body Metrics — Weight, fat mass, and body water trend lines on a single chart
🌙 Sleep Duration — Hours slept per night over time
😊 Mood Trend — Daily mood rating (1–5) plotted as a line chart

Use the time range filter (7D | 30D | 90D | All) to zoom in or out. Calorie, Macro, Water, Sleep, and Mood charts are hidden on "All Time" to maintain performance with large datasets. Exercise and Body charts remain visible on all ranges.

Summary stats at the top adapt dynamically — showing only the metrics for charts you have visible (e.g., average calories, average sleep, weight change).

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10. Streaks, XP & Leaderboard

Day Streaks

Log any entry (food, water, exercise) on consecutive days to build your streak. Miss a day and it resets to zero. Enable Streak Saver notifications to get a reminder before the day ends.

XP System

Earn experience points for daily logging activity. You can earn up to 15 XP per day across 3 categories (food, water, exercise — 5 XP each). XP is only awarded for same-day entries to prevent manipulation.

Community Leaderboard

See how you stack up against other Lejavu users. The leaderboard shows the top 50 users ranked by total XP, with medal badges (🥇🥈🥉) for the top 3. Your position is always highlighted so you can find yourself easily.

Full privacy control: You can toggle your leaderboard visibility on or off at any time from Profile settings. When hidden, your name and avatar are anonymized on the board.

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11. Profile & Settings

Your Profile tab is where you manage everything about your account:

Body Stats — Update height, weight, age, gender anytime
Goal & Activity — Change your fitness goal and activity level
Daily Goals — View and recalculate your calorie/macro/water targets
Unit System — Switch between Metric (kg, cm, ml) and Imperial (lbs, ft/in, fl oz)
Notifications — Fine-tune meal times, water intervals, exercise days, sleep reminders, and streak protection
Leaderboard Visibility — Choose whether you appear on the public leaderboard
Lifestyle Trackers — Enable or disable individual lifestyle metrics
Export Data — Download all your data as an Excel file (.xlsx) with separate sheets for every data type
AI Avatar — Generate or regenerate your unique avatar at any time
Delete Account — Permanently delete all your data (requires typing "DELETE" to confirm)

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12. Pro Tips

Build your food library early. The more foods you save to "My Foods," the faster logging becomes. Use AI scan once, save it, and reuse forever.

Create workout templates. Don't rebuild your routine every day. Save your go-to workouts as templates and log them with one tap.

Use the date strip. Forgot to log yesterday's dinner? Swipe left on the date band, select yesterday, and log it retroactively.

Chat with the AI. After a photo or text scan, use the follow-up chat to refine results — "make it a large portion" or "I only ate half."

Check Insights weekly. The real value of tracking isn't daily numbers — it's the trends over time. Make it a habit to review your weekly charts.

Enable Streak Saver. Turn on the streak protection notification. It'll remind you to log something before midnight so you don't break your streak.

Tap the macro total. When entering food manually, the computed calorie total (from P×4 + C×4 + F×9) is tappable — tap it to auto-fill the calorie field.

How to Use Lejavu

📑 Table of Contents