See it in action
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Track your calorie budget like a financial budget—know exactly what you're spending, what you have left, and where you're headed. Science-backed weight forecasting with AI food scanning, calorie budgets, and real-time spending tracking.
Swipe through the app's screenshots
Science-backed features for sustainable weight management
Everything you need for sustainable, data-driven weight management built around calories, activity, and fasting.
Predict where your weight is heading based on recent measurements, calorie balance, and goals – shown on an Auto-Zoom chart that focuses on the next few weeks.
Budget-based calorie tracking - simple 'spend vs. budget' approach
See daily deficit/surplus against your target with visual charts.
Log meals in seconds using a predefined food list for your usual choices, or enter calories from labels for packaged foods and save them as favorites.
Track your intermittent fasts, see fasting windows overlaid on your weight curve, and understand how different patterns correlate with progress.
Record calories burned from walks, runs, strength training, and more using predefined exercise templates or custom entries.
Sync workouts, steps, and active calories from compatible devices like Apple Watch, Fitbit, and Garmin so your budget reflects your real day.
Sync data from compatible smart scales so every weigh-in appears automatically on your LyteFast charts.
Optional AI-powered tools that enhance tracking with computer vision, barcode analysis, and smart insights.
Snap a photo, get instant calorie estimates with 50 scans per day
Track the environmental impact (CO₂e) of your food choices
Gluten indicators based on barcode scanning and meal analysis
Download LyteFast today and get your 3-day free trial.
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