Flex AI Workout Trainer & Log vs Ray
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.
Ray
This app acts as a personal trainer, providing real-time voice guidance for workouts. It adapts to your schedule, physical limitations, and goals, offering customized routines whether you're at the gym or at home. It automatically counts reps and learns your preferences over time.
- Real-time voice guidance
- Adaptive workout adjustments
- Automatic rep counting
- Personalized training plans
- Workout accountability checks
- Learns user preferences
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Meet Ray — your AI personal trainer. Voice-guided strength training that listens, adapts, and remembers what works for you. All the benefits of a personal trainer for a fraction of the price. No more staring at your phone between sets. No more guessing what to do at the gym. Just show up, and Ray handles the rest. TRAINING THAT FITS YOUR LIFE Real trainers are effective because they know you — your schedule, your injuries, your goals. But at $100-200/hour, most people can't afford that. Ray brings that same personalized experience to your phone. Tell Ray your shoulder's bothering you, and your workout adjusts instantly. Running late? Ray will build a shorter session. Traveling with no equipment? Ray creates a bodyweight workout on the spot. This isn't a workout library. It's a coach that pays attention. WHAT MAKES RAY DIFFERENT ◆ TALK. RAY LISTENS. Talk to Ray during your workout. Say "my shoulder hurts" — Ray adjusts the workout instantly. Say "I'm tired" — Ray scales the intensity. No menus. No settings. Just conversation. ◆ VOICE-GUIDED WORKOUTS Ray coaches you through every rep with clear audio cues. Your phone stays in your pocket — not in your face. ◆ LEARNS AND REMEMBERS The more you train with Ray, the better Ray gets at knowing what works for you. Your preferences, your progress, your patterns — Ray remembers it all. ◆ COUNTS REPS HANDS-FREE Ray counts reps for you on supported exercises — so you can focus on form, not math. ◆ KEEPS YOU ACCOUNTABLE Ray checks in before your workout to make sure you're showing up. Miss a session? Ray helps you reschedule and get back on track. WORKOUTS FOR EVERY GOAL - Strength Training & Muscle Building - Weight Loss & Fat Burning - HIIT & Conditioning - Bodyweight & Core - Mobility & Flexibility - Gym or At-Home — dumbbells, barbells, machines, bodyweight BUILT FOR REAL LIVES Ray integrates with Apple Watch and Apple Health to track your workouts and sync your progress automatically. Your training data stays connected — even when you work out outside the app. Whether you're returning to lifting after years off or building your first routine, Ray meets you where you are. Real schedules. Real bodies. Real progress. Stop planning. Start training. Download Ray and get your first workout today — free. Terms of Use: https://www.rayfit.com/terms-service/
Screenshots
Verdict
Flex AI Workout Trainer & Log and Ray both sit at 4.6 stars, but that hides the real split: 90% of Ray's written reviews are positive against 69% of Flex AI Workout Trainer & Log's. Flex AI Workout Trainer & Log's advantage is ratings volume (2.4K vs 312). On price, rating, update cadence and ads 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 Ray sells 12 in-app purchases, starting at $19.99 per month. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 4.6 for Flex AI Workout Trainer & Log against 4.8 for Ray. That said, the two scores are not equally well evidenced: Flex AI Workout Trainer & Log has 2.4K ratings behind it against 312, so its average is the more settled of the two. Written reviews are what separate them: 69% of Flex AI Workout Trainer & Log's written reviews are positive against 90% of Ray's.
Flex AI Workout Trainer & Log ships an update every 9 days, Ray every 6 days. The most recent releases landed on October 29, 2026 and October 30, 2026 respectively.
| Parameter | Flex AI Workout Trainer & Log | Ray |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (2.4K ratings) | 4.8 (312 ratings) — better |
| Positive reviews | 69.0% of reviews | 89.9% of reviews — better |
| Number of ratings | 2.4K — better | 312 |
| Update frequency | Every 9 days | Every 6 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | Free with in-app purchases |
| Devices | iPhone, Apple Watch | iPhone, Apple Watch |
| Requires iOS | 18.0 | 18.0 |
| Further details — not scored | ||
| Size | 574 MB | 177 MB |
| Age rating | 17+ | 4+ |
| Developer | Flex Artificial Intelligence Inc. | Ray Fitness Systems Inc. |
Customer experience
Flex AI Workout Trainer & Log
Ray
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
Ray
From 312 App Store ratingsWhat we love
- 👍 Easy to use and personalized workouts
- 🚀 Intuitive and clean interface
- 💡 Customizable training plans
- 👍 Helpful video tutorials
- 👍 Integrates with health apps
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
Ray
No bugs or feature requests surfaced in reviews.
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
Show 3 moreShow fewer
- 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
Ray
- Premium Access14 Days trial3 variants$19.991 Month
- Premium Access7 Days trial$19.991 Month
- Premium Access$19.991 Month
Show 9 moreShow fewer
- Premium Access$24.991 Month
- Premium Access14 Days trial3 variants$39.993 Months
- Premium Access7 Days trial$39.993 Months
- Premium Access$39.993 Months
- Premium Access$59.993 Months
- Premium Access14 Days trial3 variants$119.991 Year
- Premium Access7 Days trial$119.991 Year
- Premium Access$119.991 Year
- Premium Access$179.991 Year
Questions
Is Flex AI Workout Trainer & Log free?
Is Ray free?
Which has better reviews, Flex AI Workout Trainer & Log or Ray?
Do Flex AI Workout Trainer & Log or Ray have ads?
Which is updated more often, Flex AI Workout Trainer & Log or Ray?
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