# LyteFast: Weight Loss Tracker — AI Muscle & Physique Rating > AI Muscle & Physique Rating (iPhone/iPad app by Stephane Sprauer.) - Source: https://appshunter.io/ios/app/lytefast-weight-loss-tracker/id6753265477 (this page in markdown: same URL + `.md`) - Developer: [Stephane Sprauer](https://appshunter.io/developer/1843257989) - Category: Health & Fitness, Sports - Price: Free with in-app purchases - Age rating: 4+ - Requires: iOS 18.0 · 68 MB - Languages: Australian English, Akan, Arabic, Aragonese, Asturian, Aymara, Basque, Belarusian, Breton, Catalan and 84 more - Released: 2025-11-21 - Data updated: 2026-10-24 ## What is LyteFast? Log your weight for free, sync your scale and fitness tracker, and see where you're heading. Core logging is free; the weight forecast, AI Muscle Rating, AI Body Preview and other premium features require a subscription (see below). NEW: AI Body Preview (requires AI Add-On subscription) Pick a photo and the AI generates a goal-physique visualization to help you imagine where your efforts could lead. Share the before/after to Instagram or TikTok. Results are AI-generated artistic renderings for motivational purposes only — not predictions, clinical assessments, or representations of your actual future appearance. NEW: AI Muscle Rating (requires AI Add-On subscription) Snap a photo and get an instant 1-100 score for each of 8 muscle groups (pectorals, shoulders, biceps, triceps, forearms, legs, abs, back), plus an overall rating and a gamified rank — Wood, Bronze, Silver, Gold, Platinum, Diamond, Champion, Titan, Olympian. See where you stand on the bell curve, get a comment per muscle, and share your card. Scores are AI-generated estimates, not clinical measurements. What also makes LyteFast different Auto-Zoom chart that focuses on the most relevant slice of your journey, smooths daily noise, and projects a near-term weight forecast (subscription required): Am I on track? When is the next milestone? Budget-based calories — subscription required (simple "spend vs. budget"): - AI Food Scanner recognizes common foods and portions (requires AI Add-On subscription). - Barcode Scanner pulls verified nutrition for packaged items (requires AI Add-On subscription). - Instant budget status (on/near/over) plus remaining calories and friendly guidance. Fasting, made actionable (subscription required) Log fasting windows and see their measurable impact. An animated %-to-goal gauge shows where you stand, and the Auto-Zoom chart shows where you're headed. Sustainability & sensitivities (subscription required) 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. Always know what to do next (subscription required) 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), and the smallest effective changes to close the gap. On-budget notifications help you course-correct early. Syncs when you do—works even if you don't Fitness tracker & scale sync: steps, workouts, and weigh-ins automatically. No tracker? Manual entry. Choose from 60 activity types to estimate calories burned. 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. What's free vs. subscription Free: manual weight and step logging, calorie estimator, fitness tracker & scale sync, basic charts. Base Access subscription: weight forecast, calorie deficit tracking, fasting log & insights, CO₂e footprint, gluten status indicator. AI Add-On subscription: AI Food Scanner, Barcode Scanner, AI Body Preview, AI Muscle Rating. Subscriptions are available as weekly, monthly, or yearly plans and are managed through your Apple ID. Payment is charged to your Apple ID account at confirmation of purchase. Subscriptions automatically renew unless cancelled at least 24 hours before the end of the current period. You can manage or cancel subscriptions in your Apple ID account settings at any time. All features are estimates and do not replace medical, nutritional, or fitness advice. AI Body Preview generates artistic visualizations for motivational purposes only — not predictions and not representations of your actual future appearance. AI Muscle Rating scores are AI-generated estimates, not clinical measurements. ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Monthly LyteFast AI Add-On | $14.99 | per month | | Yearly LyteFast AI Add-On | $149.99 | per year | | Weekly LyteFast AI Add-On | $4.99 | per 7 days | | Weekly premium access | $0.99 | per 7 days | | Monthly premium access | $2.99 | per month | | Yearly premium access | $23.99 | per year | ## Is LyteFast safe? Not enough ratings yet to assess LyteFast. ## Is LyteFast legit? LyteFast: Weight Loss Tracker appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for LyteFast is 65 out of 100 points across 7 verification signals from App Store and developer data. ## Version history (last 5 releases) ### 1.6 — 2026-10-20 New in this version: A fresh new look • A redesigned dashboard with clearer cards • A native title bar with your streak and settings • A new quick-add panel for logging food, weight and activity • Calmer, more readable detail screens and settings Now on Apple Watch • Start and end a fast from your wrist, with a live countdown • Log your weight with the Digital Crown; it's saved to Apple Health • See today's calories, activity and protein at a glance • Complications for your fast and your weight goal Made for every screen • iPad support with two- and three-column layouts • Optimized for iPhone Duo, open or closed Fixes and improvements • The Fasting card keeps the right start time after you reopen the app • The Caloric Deficit card no longer overflows • Faster start-up • Notification permission is now asked when it's needed, not at first launch Thank you for using LyteFast! ### 1.5 — 2026-08-30 New in this version: Your total progress at a glance • The Progression gauge now shows how much weight you have lost since your start weight, right under your current weight • Green while you move toward your goal, red if you drift away from it Reliability and polish • The gauge now always opens on your latest weigh-in instead of an outdated stored value • The weight forecast chart keeps its full size when several milestone rows are shown • Small layout refinements across the dashboard Thank you for using LyteFast! ### 1.3 — 2026-08-18 Share your progress • Every dashboard card now has a share button: weight, fasting, calories, deficit, protein and activity • One tap turns your numbers into a clean summary card for Messages, Mail, Instagram or anywhere else • Your milestones and the period covered appear on the same image A more accurate weight chart • The value in the callout now always matches the point you tapped • The forecast line starts exactly where your own curve ends • Milestone labels no longer overlap when several targets fall close together • The 7-day average now covers a full 7-day window Your complete Apple Health history • LyteFast now reads every weigh-in you have recorded, including several on the same day, instead of a single reading per day Thank you for using LyteFast! ### 1.2 — 2026-08-09 New in this version: AI Body Preview • Generate a goal-physique visualization from a single photo • AI-generated artistic rendering for motivational purposes only • Share before/after to Instagram or TikTok AI Muscle Rating • Instant 1-100 score for 8 muscle groups (pectorals, shoulders, biceps, triceps, forearms, legs, abs, back) • Gamified ranks from Wood to Olympian • Bell-curve percentile and shareable card Improvements • Performance, stability, localization Thank you for using LyteFast! ### 1.1 — 2026-05-15 New in this version: AI Body Preview • Generate a goal-physique visualization from a single photo • AI-generated artistic rendering for motivational purposes only • Share before/after to Instagram or TikTok AI Muscle Rating • Instant 1-100 score for 8 muscle groups (pectorals, shoulders, biceps, triceps, forearms, legs, abs, back) • Gamified ranks from Wood to Olympian • Bell-curve percentile and shareable card Improvements • Performance, stability, localization Thank you for using LyteFast! ## Apps similar to LyteFast | App | Rating | Price | Category | | --- | --- | --- | --- | | [Weight Tracker: TrendWise](https://appshunter.io/ios/app/weight-tracker-trendwise/id6752212001) | — | Free | Health & Fitness | | [TanitaSync](https://appshunter.io/ios/app/tanitasync/id6758568595) | — | $2.99 | Health & Fitness | | [Physique Maxxing: Body Scan](https://appshunter.io/ios/app/physique-maxxing-body-scan/id6760964994) | — | Free | Health & Fitness | | [Weivly](https://appshunter.io/ios/app/weivly/id6751336415) | — | Free | Health & Fitness | | [Stoolytics](https://appshunter.io/ios/app/stoolytics/id6761431119) | 5.0 (1) | Free | Health & Fitness | | [TrendWeight AI: Weight Tracker](https://appshunter.io/ios/app/trendweight-ai-weight-tracker/id6785865699) | — | Free | Health & Fitness | ## More apps by Stephane Sprauer - [GlutenScanning](https://appshunter.io/ios/app/glutenscanning/id6755107431) - [Decarbonr](https://appshunter.io/ios/app/decarbonr/id6756505115) - [Drive Charge Eat](https://appshunter.io/ios/app/drive-charge-eat/id6762020397) - [Travel Scanning: Trip Ideas](https://appshunter.io/ios/app/travel-scanning-trip-ideas/id6772534775) - [Sardines Fasting](https://appshunter.io/ios/app/sardines-fasting/id6773024058) All apps by Stephane Sprauer: https://appshunter.io/developer/1843257989 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-24.*