Synix. vs Project Lean
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Synix.
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Achieve your fitness goals with personalized plans by your favorite fitness influencers. Track body measurements, log meals, follow workout routines, and analyze your progress with smart tools—all in one app. Whether you're training solo or guided by a personal trainer, we give you the tools to succeed. - Trainer marketplace with country & currency filters - Trainer-Trainee progress tracker - 1800+ foods and custom meal logging - Workout builder with 300+ exercise videos - Progress tracking with photos and stats - BMI, TDEE, BMR & macro calculators - Cloud-based backup & secure data handling Developed by engineers with 10+ years in the fitness industry, built for your needs—not trends. We listen, adapt, and improve—because your fitness journey deserves it.
Project Lean
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Project Lean is nutrition coaching that names patterns. Most calorie trackers leave you alone with the numbers. Project Lean is different. You scan your meals, and the AI estimates macros automatically. Then it watches the patterns: which days you fall off, which foods you reach for under stress, where your week falls apart, what's actually moving your goals forward. Every day, you check in. The AI coach reads everything: today's meals, your patterns this week, your goals, your weak spots. It names what it sees. Sometimes it pushes back. Always concrete, never generic. Once a week, Insights pulls it all together: habit consistency, mood trends, what's working, what isn't. Project Lean is designed for people who already know nutrition basics and want something to think alongside them, not a tracker that just counts. WHAT YOU GET - AI meal scanning from photos: point your camera at the plate, log the macros - Macro estimation with confidence ratings so you know when to double-check - Daily check-ins for habits, mood, stress, and cognitive patterns - AI coach with full context: your profile, your week, your history - Lean Brain chat: open-ended questions, coach-quality answers - Weekly Insights with pattern recognition across habits and mood - Streak tracking with reset day support (planned cheat days don't break your streak) - Meal templates for foods you eat on repeat - Push reminders at your chosen daily time WHO IT'S FOR People serious about their nutrition who want a thinking partner, not a database. Works for cutting, bulking, recomp, or just keeping yourself honest. PRIVACY Your data stays yours. Meal photos, check-ins, and chat messages are private to your account. We never sell or share your data with advertisers. Sign in is required so your data syncs across devices and you can recover your account. SUPPORT Questions? Reach us at support@theleanbrain.app or visit https://theleanbrain.projectlean.app/support
Screenshots
Verdict
The clearest difference is ads: Project Lean at none against Synix.'s shown. On price, update cadence, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Synix. ships an update every 3 weeks, Project Lean every 2 weeks. The most recent releases landed on September 10, 2026 and June 25, 2026 respectively.
| Parameter | Synix. | Project Lean |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 weeks | Every 2 weeks — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.1 | 15.1 |
| Further details — not scored | ||
| Size | 227 MB | 45 MB |
| Age rating | 4+ | 4+ |
| Developer | ELEMENT FOR TECHNOLOGICAL DEVELOPMENT | Stride Performance |
In-app purchases
Synix.
No in-app purchases
Project Lean
No in-app purchases





