LyteFast
Weight Loss Calorie Tracker
Only for iPhone
Free · In-App Purchases · Designed for iPhone
iPhone
Science-backed weight tracking & forecast with AI food scanning for calories, carbon footprint, and gluten flags via barcode; plus calorie budgets and calorie deficit
LyteFast is a weight-tracking app built to keep you moving—not just logging numbers.
What makes it different
Auto-Zoom chart that focuses on the most relevant slice of your journey.
Smooths daily noise and highlights momentum.
Projects a near-term weight forecast so you can answer at a glance: Am I on track? When is the next milestone?
Budget-based calories (simple "spend vs. budget"):
AI Food Scanner recognizes common foods and portions.
Barcode Scanner pulls verified nutrition for packaged items.
After every scan you get instant budget status (on/near/over) plus remaining calories and friendly guidance.
Fasting, made actionable
Log fasting windows and see their measurable impact with a dedicated view.
An animated %-to-goal gauge shows where you stand now.
The Auto-Zoom prediction chart shows where you're headed if you keep doing what works.
Grounded in research: benefits of time-restricted eating are largely mediated by total intake and consistency—LyteFast links fasting back to your budget, trend, and forecast.
Sustainability & sensitivities
Each meal scan includes estimated CO₂e (carbon footprint) so you can see environmental impact over days and weeks.
Packaged items can display a gluten status indicator for quick screening.
Insights inform—never judge, helping you align choices with your health and values.
Always know what to do next
A clear, always-visible calorie deficit view translates energy balance into plain language:
How far you are from goal.
What's driving the current trend (intake, activity, fasting).
The smallest effective changes to close the gap.
On-budget notifications help you course-correct early, when it's easiest.
Syncs when you do—works even if you don't
Fitness tracker & connected scale sync: steps, workouts, heart-rate-based estimates, and weigh-ins automatically.
No tracker or smart scale?
Manual weight entry.
Choose from 60 activity types (from walking meetings to HIIT) to estimate calories burned—so your budget reflects your real day.
Fast logging without scanning
Use the Calorie Estimator with 60 predefined foods to compute intake quickly.
Each item includes a simple carbon-footprint range (low / medium / high) and gluten status for a quick read on nutrition and impact.
Evidence-based under the hood
Energy balance is the primary driver of weight change.
Trend smoothing reduces day-to-day noise (hydration, sodium, timing).
Short-horizon predictive modeling turns your recent trajectory into actionable forecasts.
Self-monitoring + timely feedback supports adherence and long-term habits.
Why people stick with LyteFast
Motivating visuals that keep progress front and center.
Instant feedback after each scan so you can act with confidence.
Fasting insights tied to outcomes—not hype.
Eco & dietary signals at a glance.
Activity-aware budgeting (sync or manual).
Deficit clarity: always see the gap—and the best lever to close it.
Bottom line: LyteFast isn't just another calorie app. It's a motivation system built on proven principles, designed to shorten the distance between intention and action. Open the app, scan or estimate a meal, see your status, and take the next step—with a forecast that shows exactly where those steps will lead. That's how you stay on track, one clear decision at a time.
In-app regional languages (25): Welsh, Breton; Basque, Catalan (Spain), Corsican, Frisian, Luxembourgish, Occitan, Romansh, Sardinian, Swiss German, Alsatian; Norwegian Bokmål, Nynorsk; Arabic (Saudi Arabia); plus additional base language codes.
All features and insights are estimates intended for informational purposes and do not replace professional medical advice.
Ratings & Reviews
This app hasn’t received enough ratings or reviews to display an overview.
The developer, Stephane Sprauer, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- LyteFast
- Size
- 56 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.0 or later.
- Languages
English and 93 more
- English, Akan, Arabic, Aragonese, Asturian, Aymara, Basque, Belarusian, Breton, Catalan, Central Atlas Tamazight, Cornish, Corsican, Croatian, Czech, Danish, Dutch, Estonian, Ewe, Faeroese, Finnish, French, Frisian, Friulian, Fulah, Gaelic, Galician, Ganda, German, Greek, Guarani, Hawaiian, Hebrew, Hindi, Hungarian, Igbo, Indonesian, Irish, Italian, Japanese, Kabyle, Kashubian, Kinyarwanda, Korean, Ladin, Ladino, Latvian, Ligurian, Lithuanian, Lombard, Low German, Lower Sorbian, Lule Sami, Luxembourgish, Malay, Manx, Maori, Neapolitan, Northern Sami, Norwegian Bokmål, Norwegian Nynorsk, Occitan, Piemontese, Polish, Portuguese, Quechua, Rhaeto-Romance, Romanian, Russian, Rusyn, Samoan, Sardinian, Sicilian, Silesian, Simplified Chinese, Slovak, Southern Sami, Spanish, Swedish, Swiss German, Tachelhit, Tahitian, Thai, Tonga, Traditional Chinese, Turkish, Ukrainian, Upper Sorbian, Venetian, Vietnamese, Welsh, Wolof, Yiddish, Yoruba
- Age Rating
9+
- 9+
- Contains
Health or Wellness Topics
- In-App Purchases
Yes
- Weekly LyteFast AI Add-On $2.99
- Yearly LyteFast AI Add-On $79.99
- Yearly premium access $29.99
- Monthly premium access $3.99
- Monthly LyteFast AI Add-On $7.99
- Weekly premium access $0.99
- Copyright
- © 2025 LyteFast