Flex AI Workout Trainer & Log vs Zeno
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Flex AI Workout Trainer & Log
This app uses AI to provide personalized workout plans and real-time form feedback for weightlifters. It tracks progress, offers adaptive progression, and includes motivational features like leaderboards and streaks. It's designed for all experience levels, from beginners to pros.
- AI personal trainer
- Real-time form feedback
- Personalized workout plans
- Adaptive progression
- Strength tracking
- Community leaderboards
- Apple Watch integration
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Flex AI is the world’s first true AI personal trainer — built for lifters who want to train smarter, progress faster, and perfect their form. Whether you’re chasing size, strength, or consistency, Flex uses real-time AI to guide every rep, adjust your program, and keep you motivated through challenges, leaderboards, and streaks. - Your AI Coach, Every Rep Personalized workouts built automatically by AI personas that learn your goals, history, and preferences. Real-time form feedback powered by patented computer-vision AI — get instant corrections on squats, bench, deadlift, rows, and more. Adaptive progression and deloading backed by sports-science principles — no spreadsheets, no guesswork. - Train Smarter — See Results AI tracks your strength curve and increases weight when you’re ready. Visual progress graphs show PRs, volume, and recovery trends. Track sets, reps, and tempo with a tap — or automatically with Apple Watch. - Stay Motivated & Connected Join a global community of lifters. Compete on leaderboards, build streaks, and earn badges. Post progress photos, celebrate milestones, and share results. - Accessible to Everyone Free to start with all core features included. Upgrade anytime for advanced AI coaching and premium analytics. Designed for all experience levels — from beginners to pros. - Why Flex AI Real-time AI form feedback (patented) Adaptive, science-based programming Progress tracking & recovery insights Gamified streaks + leaderboards Apple Watch integration Built for hypertrophy & strength goals Start Training Smarter — Today Download Flex AI and experience personal training powered by real AI. Perfect your form. Unlock your best lift. Train smarter — free on iPhone + Apple Watch.
Zeno
This app offers personalized programs for strength training, meditation, breathwork, and flexibility. It guides users from beginner to advanced levels with expert-designed content, helping them build and track new healthy habits.
- Strength training programs
- Guided meditation sessions
- Breathwork exercises
- Flexibility routines
- Personalized habit programs
- Beginner to advanced levels
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Zeno is the simple app for people who want to train, eat and move well — without drowning in research, apps and $100 subscriptions. Plan and log your workouts. Track your calories and macros. Build a daily stretching habit. All in one app. Free forever plan. WHAT YOU GET STRENGTH TRAINING Custom workout programs, built around you. - Tell Zeno your equipment, schedule, goals and even your injuries. It builds the plan. - Know exactly what to lift — every set, every rep. - Weights go up automatically as you get stronger. Progressive overload, handled. - Log every set, rep and workout. Watch the numbers climb. - Learn proper form with 3D demonstrations you can rotate and zoom. CALORIE TRACKING Track your calories and macros without the obsession. - Search foods or scan a barcode. - See your calories, protein, carbs and fat at a glance. - Built to support your training, not take over your life. FLEXIBILITY Loosen up and move better. - Follow guided stretching routines. - Target the areas that need it. - A few minutes a day is enough. WHY ZENO Every level, from your first session on. Most apps assume you already know what you're doing. Zeno meets you where you are — beginner to advanced. Nothing to decide. Open the app. It tells you what to do today. One app, not five. Training, nutrition and mobility in one place. Free forever plan. No ads. No credit card. Premium is there if you want more, never a trap. Most workout apps cost over $100 a year. Zeno has a free forever plan. This app won't change your life. You will. Start today. FREQUENTLY ASKED QUESTIONS Is Zeno really free? Yes. The free forever plan gives you real, usable training, tracking and flexibility — no credit card, no trial countdown. Upgrade only if you want more. Do I need any experience? No. Choose beginner, intermediate or advanced. Zeno meets you where you are and progresses as you improve. Is this just a habit tracker? It's more than a tracker. Zeno builds your plan, tells you what to do, and adjusts as you go — from your first session to your hundredth. Terms of service: https://zenoapp.io/#terms-conditions Privacy policy: https://zenoapp.io/#privacy-policy Contact: developer@zenoapp.io
Screenshots
Verdict
The clearest difference is review sentiment: Zeno at 94% against Flex AI Workout Trainer & Log's 69%. Zeno also leads on rating (4.8 vs 4.6) and iOS requirement (16.0 vs 18.0). Flex AI Workout Trainer & Log's advantage is update cadence (every 9 days vs every 3 weeks) and ratings volume (2.4K vs 316). On price, ads, in-app purchases and monetization model 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. Flex AI Workout Trainer & Log sells 8 in-app purchases, starting at $12.99 per month and Zeno sells 4 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.
Zeno holds the better App Store score, 4.8 against 4.6. That said, the two scores are not equally well evidenced: Flex AI Workout Trainer & Log has 2.4K ratings behind it against 316, so its average is the more settled of the two. Written reviews point the same way: 69% of Flex AI Workout Trainer & Log's written reviews are positive against 94% of Zeno's.
Flex AI Workout Trainer & Log ships an update every 9 days, Zeno every 3 weeks. The most recent releases landed on October 20, 2026 and October 22, 2026 respectively.
| Parameter | Flex AI Workout Trainer & Log | Zeno |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (2.4K ratings) | 4.8 (316 ratings) — better |
| Positive reviews | 69.0% of reviews | 94.4% of reviews — better |
| Number of ratings | 2.4K — better | 316 |
| Update frequency | Every 9 days — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | Free with in-app purchases |
| Devices | iPhone, Apple Watch — better | iPhone |
| Requires iOS | 18.0 | 16.0 — better |
| Further details — not scored | ||
| Size | 574 MB | 130 MB |
| Age rating | 17+ | 4+ |
| Developer | Flex Artificial Intelligence Inc. | Zeno App Pty Ltd |
Customer experience
Flex AI Workout Trainer & Log
Zeno
User reviews
Flex AI Workout Trainer & Log
From 2.4K App Store ratingsWhat we love
- 🚀 Detailed workout tracking
- 👍 Customizable workouts
- 🔒 Comprehensive exercise library
- 💡 Helpful progress tracking
- 👍 Clean and intuitive interface
Room to improve
- 🐛 Glitches and bugs
- 💰 Expensive premium subscription
- 🔒 Limited functionality without premium
- 🐛 Inconsistent rest timer
- 🐛 Workout data loss
Zeno
From 316 App Store ratingsWhat we love
- 👍 Comprehensive all-in-one fitness and wellness platform
- 💰 Excellent free version with premium features
- 🎯 Personalized workout generation based on preferences
- 📱 User-friendly and intuitive interface
- 🧘 Diverse features including meditation, breathwork, and flexibility
Room to improve
- 🐛 App crashes and stability issues
- ⚙️ Rigid workout generation for advanced lifters
- 💾 Workout history resets weekly without premium
- 🔧 Unresponsive customer support
- ⚠️ Unit conversion bugs (kg/lbs not saving)
Bugs and requests
Flex AI Workout Trainer & Log
Reported bugs
3 issues- App crashes on iOS 16 update
- Inability to log workouts on previous days
- Inconsistent syncing between app and Apple Watch
Requested features
4 requests- Offline workout mode
- Ability to save and reuse custom workout plans
- Muscle group targeting and analytics
- Social features and community integration
Zeno
Reported bugs
7 issues- App crashes frequently
- Unit settings reset to feet/pounds without saving changes
- Weight input gets doubled when entered
- Difficulty changing reps and weight values
- App lag when switching to foreground
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- Nutrition module not user-friendly for macro tracking on-the-go
- Workout history loss on weekly reset
Requested features
13 requests- Hydration tracking feature
- Cardio workout module
- Progressive overload auto-adjustment for weights
- Apple Watch compatibility
- Apple Health integration
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- Nutrition tracking full release
- Water intake tracking
- Muscle-specific split options (Back/Bis, Chest/Tris)
- Ability to write workout notes
- More detailed exercise library
- Customizable weight options
- Bench press and targeted muscle group exercises
- Coming soon features visibility
In-app purchases
Flex AI Workout Trainer & Log
- Premium Subscription Monthly$12.991 Month
- Premium Plus Monthly$29.991 Month
- Premium Plus Family Monthly$69.991 Month
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- Premium Yearly Subscription$79.991 Year
- Premium Plus Yearly7 Days trial$191.991 Year
- Premium Plus Family Yearly7 Days trial$499.991 Year
- 1 Month Free PremiumFree
- Lifetime Free PremiumFree
Zeno
- Zeno Plus Monthly Subscription7 Days trial$4.991 Month
- Zeno Plus Monthly Subscription7 Days trial$15.001 Month
- Zeno Plus Annual Subscription7 Days trial$49.991 Year
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- Zeno Plus Annual Subscription7 Days trial$90.001 Year
Questions
Is Flex AI Workout Trainer & Log free?
Is Zeno free?
Which has better reviews, Flex AI Workout Trainer & Log or Zeno?
Do Flex AI Workout Trainer & Log or Zeno have ads?
Which is updated more often, Flex AI Workout Trainer & Log or Zeno?
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