Comparison

Flex AI Workout Trainer & Log vs SHRED

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

SHRED

This app empowers fitness instructors to create professional-quality workout videos using just their iPhone. It simplifies the production process with AI tools and automated features, allowing creators to share their classes with a global audience.

Highlights
  • Studio-quality content creation
  • AI-based tooling
  • Automated timers and animations
  • Class customization
  • No expensive equipment needed
  • Access to global user base
Features
Read full description

Welcome to Shred’s Creator Studio — the most powerful tool for fitness creators on the planet. Creator Studio allows anyone to produce studio-quality fitness content right in their living room. With an easy step-by-step process, smart AI-based tooling, and fun class customizations, you’re just a few taps a way from letting the world experience your incredible workout classes. What you’ll love about Creator Studio: + No need for expensive camera equipment — simply grab an iPhone and you’re good to go! + Forget expensive post-production. Our system automates timers, animations, rest periods, and more! + Get access to Shred’s millions of users around the world to grow your following as more people take your classes Access to Creator Studio is currently invite-only. If you’re interested in joining, please go to www.shred.app/creator to apply. Privacy Policy: https://www.shred.app/privacy-creator Terms of Use: https://www.shred.app/terms-creator

Screenshots

Flex AI Workout Trainer & Log4 screens
SHRED4 screens

Verdict

The call

The clearest difference is in-app purchases: SHRED at none against Flex AI Workout Trainer & Log's 8. SHRED also leads on review sentiment (100% vs 69%) and rating (5.0 vs 4.6). Flex AI Workout Trainer & Log's advantage is ratings volume (2.4K vs 6) and update cadence (every 9 days vs every 3 weeks). On price, ads 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

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. SHRED asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

SHRED 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 6, 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 100% of SHRED's.

UpkeepUpdate frequency

Flex AI Workout Trainer & Log ships an update every 9 days, SHRED every 3 weeks. The most recent releases landed on October 2, 2026 and September 20, 2026 respectively.

Scorecard7 real differences · 3 level
Flex AI Workout Trainer & Log versus SHRED: the parameters behind the verdict, then further details
ParameterFlex AI Workout Trainer & LogSHRED
PriceFreeFree
Rating4.6 (2.4K ratings)5.0 (6 ratings) — better
Positive reviews69.3% of reviews100.0% of reviews — better
Number of ratings2.4K — better6
Update frequencyEvery 9 days — betterEvery 3 weeks
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemiumFree — better
DevicesiPhone, Apple WatchiPhone, iPad, iPod — better
Requires iOS18.013.0 — better
Further details — not scored
Size574 MB46 MB
Age rating17+4+
DeveloperFlex Artificial Intelligence Inc.Shred Labs, LLC

Customer experience

Flex AI Workout Trainer & Log

All ratings2,405 ratings
Positive92.0%
Neutral2.6%
Negative5.4%
Written reviews303 reviews
Positive69.3%
Neutral6.6%
Negative24.1%

SHRED

All ratings6 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
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

SHRED

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
None

SHRED

No in-app purchases

Questions

Is Flex AI Workout Trainer & Log free?
Flex AI Workout Trainer & Log is free to download, with in-app purchases available.
Is SHRED free?
SHRED is free to download, with no in-app purchases.
Which has better reviews, Flex AI Workout Trainer & Log or SHRED?
SHRED is rated higher. Flex AI Workout Trainer & Log averages 4.6 out of 5 from 2.4K ratings, while SHRED averages 5.0 from 6 ratings.
Do Flex AI Workout Trainer & Log or SHRED have ads?
Neither Flex AI Workout Trainer & Log nor SHRED shows ads.
Which is updated more often, Flex AI Workout Trainer & Log or SHRED?
Flex AI Workout Trainer & Log ships an update every 9 days, and SHRED every 3 weeks. Most recently, Flex AI Workout Trainer & Log was updated on October 2, 2026 and SHRED on September 20, 2026.

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