Comparison

Flex AI Workout Trainer & Log vs AI Workout Planner

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • AI personal trainer
  • Real-time form feedback
  • Personalized workout plans
  • Adaptive progression
  • Strength tracking
  • Community leaderboards
  • Apple Watch integration
Features
Read full description

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.

About

AI Workout Planner

This AI-powered fitness app acts as your personal trainer and planner. It generates custom workouts, analyzes progress, and builds meal plans to help you achieve your health and fitness goals faster.

Highlights
  • AI personal trainer and coach
  • Personalized workout generation
  • Smart workout tracking
  • Extensive exercise library
  • AI-powered meal tracking
  • Supplement management
  • Habit and reminder system
Features
Read full description

Your workouts, nutrition, goals and health. Connected in one daily routine. Connefi helps you plan what to do, record what you complete and see what comes next. Start with a personalized plan and bring your routine together with PERI, your AI fitness assistant. YOUR DAY, IN FOCUS Open Home for today's routine, your next activity and relevant PERI findings. Organize training, meals and supplements in Plan, then use Schedule and History to follow your routine and revisit completed days. TRAIN AND TRACK Build gym or home workouts around your equipment and preferences. Log sets, reps, weights and rests, and follow available exercise demonstrations. Use Finish to save completed work in a workout summary, with duration you can review and edit. NUTRITION THAT FITS YOUR ROUTINE Plan meals, track calories, protein, carbohydrates and fat, and log water throughout the day. Schedule supplements by dose and time. With Premium, photograph or describe a meal, review the nutrition estimate and save your log. PERI, WITH YOUR ROUTINE IN MIND Ask about training, nutrition or recovery. PERI can use relevant profile details, plans, goals, logged activity and available health summaries to offer personalized guidance. Short on time or missing equipment? Request a plan adjustment and review the changes before applying them. Keep useful context in PERI Files and folders. GOALS WITH A NEXT STEP Manage multiple goals, record results and track progress. Premium Goal Intelligence adds contributors, suggested next moves and goal reviews to help you decide what to focus on. YOUR HEALTH, IN CONTEXT Connect Apple Health to explore available recovery, sleep, stress and activity information. Open Primary Sleep for your main sleep episode, stages and overnight signals where recorded. Log cycle information and symptoms, and explore available trends. With separate permission, save supported workout, nutrition and hydration logs to Apple Health. EXPLORE YOUR LONG-TERM HEALTH Premium includes biological-age estimates with contributing signals and history, plus health-record import with review and correction. Everyday wellness estimates and lab-based calculations use different inputs and methods. FREE AND PREMIUM Free access includes your initial onboarding plan, manual logging, basic goals and connected-health views. Ongoing PERI, AI meal analysis, advanced goal and health intelligence, biological-age features and health-record import require Premium or an eligible active trial. Intelligence usage limits are shown in the app. Health features depend on permissions, compatible data sources and sufficient history. Biological-age features are for adults 18+. Estimates and AI guidance are for general wellness, not diagnosis, treatment or a prediction of lifespan. Privacy: https://www.connefi.app/privacy-policy Terms: https://www.connefi.app/terms-of-service Apple standard EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Flex AI Workout Trainer & Log4 screens
AI Workout Planner4 screens

Verdict

The call

The clearest difference is ads: Flex AI Workout Trainer & Log at none against AI Workout Planner's shown. Flex AI Workout Trainer & Log also leads on ratings volume (2.4K vs 1). AI Workout Planner's advantage is rating (5.0 vs 4.6). On price, update cadence, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Flex AI Workout Trainer & Log sells 8 in-app purchases, starting at $12.99 per month and AI Workout Planner sells 3 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

AI Workout Planner holds the better App Store score, 5.0 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 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Flex AI Workout Trainer & Log ships an update every 9 days, AI Workout Planner every 2 weeks. The most recent releases landed on October 24, 2026 and October 20, 2026 respectively.

Scorecard3 real differences · 7 level
Flex AI Workout Trainer & Log versus AI Workout Planner: the parameters behind the verdict, then further details
ParameterFlex AI Workout Trainer & LogAI Workout Planner
PriceFreeFree
Rating4.6 (2.4K ratings)5.0 (1 ratings) — better
Positive reviews69.0% of reviews—
Number of ratings2.4K — better1
Update frequencyEvery 9 days — betterEvery 2 weeks
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFreemiumFree with in-app purchases
DevicesiPhone, Apple WatchiPhone, iPad
Requires iOS18.017.0 — better
Further details — not scored
Size574 MB368 MB
Age rating17+12+
DeveloperFlex Artificial Intelligence Inc.mohammad amin ghassem

Customer experience

Flex AI Workout Trainer & Log

All ratings2,412 ratings
Positive92.0%
Neutral2.6%
Negative5.4%
Written reviews310 reviews
Positive69.0%
Neutral6.5%
Negative24.5%

AI Workout Planner

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

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

AI Workout Planner

Not enough reviews yet to summarise bugs or requests.

In-app purchases

8 purchases

Flex AI Workout Trainer & Log

Subscriptions6
  • Premium Subscription Monthly$12.991 Month
  • Premium Plus Monthly$29.991 Month
  • Premium Plus Family Monthly$69.991 Month
Show 3 more
  • Premium Yearly Subscription$79.991 Year
  • Premium Plus Yearly7 Days trial$191.991 Year
  • Premium Plus Family Yearly7 Days trial$499.991 Year
One-time2
  • 1 Month Free PremiumFree
  • Lifetime Free PremiumFree
3 purchases

AI Workout Planner

Subscriptions3
  • Premium plan(weekly)$2.997 Days
  • Premium plan (monthly)7 Days trial$9.991 Month
  • Premium plan (yearly)14 Days trial$74.991 Year

Questions

Is Flex AI Workout Trainer & Log free?
Flex AI Workout Trainer & Log is free to download, with in-app purchases available.
Is AI Workout Planner free?
AI Workout Planner is free to download, with in-app purchases available.
Which has better reviews, Flex AI Workout Trainer & Log or AI Workout Planner?
AI Workout Planner is rated higher. Flex AI Workout Trainer & Log averages 4.6 out of 5 from 2.4K ratings, while AI Workout Planner averages 5.0 from 1 ratings.
Do Flex AI Workout Trainer & Log or AI Workout Planner have ads?
AI Workout Planner shows ads; Flex AI Workout Trainer & Log does not.
Which is updated more often, Flex AI Workout Trainer & Log or AI Workout Planner?
Flex AI Workout Trainer & Log ships an update every 9 days, and AI Workout Planner every 2 weeks. Most recently, Flex AI Workout Trainer & Log was updated on October 24, 2026 and AI Workout Planner on October 20, 2026.

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