Comparison

Flex AI Workout Trainer & Log vs Train With Soph

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

Train With Soph

Access personalized, evidence-based training and nutrition programs designed by experts to help you build muscle, get stronger, and healthier. Programs update regularly based on your progress and goals, with options for home or gym workouts. Includes educational content and community support.

Highlights
  • Personalized training programs
  • Custom nutrition plans
  • Home and gym workout options
  • Progress tracking
  • Educational content
  • Female community support
Features
Read full description

Access simple, effective, and evidence based training programs designed to help you build lean muscle and shape, get stronger, and healthier. Each program is designed specifically for you and your goals, training level, and days of the week by world class personal trainer Sophie Allen. All programs are updated every 4 weeks based on you and your progress. Choose from 5 training goals: Cut & Tone: higher volume and intensity Grow Your Glutes: more glute emphasis plus upper body days Build & Shape: less volume and reps to progress your strength TWS At Home: minimal equipment at home workouts TWS Anywhere: no equipment workouts done anywhere Inside find additional workouts including a range of: Glute and core finishers HIIT circuits (home or gym) Cardio circuits (home or gym) Warm up and activation drills More than training - your membership includes a custom nutrition program designed by dietitian's specific to you and your needs! Choose your initial goal & change as you go: Cut & tone: a calorie deficit to lose weight Build & shape: a calorie surplus to gain muscle Maintenance: maintain your current weight, achieve body recomposition for newer trainers (lose weight whilst building lean muscle) Choose from our nutrition options: Vegan Vegetarian Standard Pescatarian Keto Low carb Dairy free Gluten free Plus 3-6 meals per day, swap any meals you dislike, add food dislikes/ allergies, receive 7 different days of food in your meal plan, plus calories and macros. Use our food diary to enter any of your own meals. Thousands of recipes updated regularly. Building habits and a healthy lifestyle is about more than your training program, get access to our educational content where we explain topics such as refeed days, training intensity, training to failure, warm up sets, and more. Find mindset content designed by our TWS psychologist Jess Allen, with worksheets and tasks designed to help you focus on what's important. Also included: Track your weights and reps to ensure you're progressing Choose to upload photos to track physical progress Join our global female community, get support from world class qualified personal trainers and coaches, and staff your journey to a healthier, more confident you today!

Screenshots

Flex AI Workout Trainer & Log4 screens
Train With Soph4 screens

Verdict

The call

The clearest difference is update cadence: Flex AI Workout Trainer & Log at every 9 days against Train With Soph's every 4 months. Flex AI Workout Trainer & Log also leads on ratings volume (2.4K vs 6). Train With Soph's advantage is iOS requirement (15.1 vs 18.0). On price, rating, review sentiment 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Flex AI Workout Trainer & Log sells 8 in-app purchases, starting at $1.99 per month and Train With Soph sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.6 for Flex AI Workout Trainer & Log against 4.5 for Train With Soph. 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 are what separate them: 69% of Flex AI Workout Trainer & Log's written reviews are positive against 63% of Train With Soph's.

UpkeepUpdate frequency

Flex AI Workout Trainer & Log ships an update every 9 days, Train With Soph every 4 months. The most recent releases landed on September 26, 2026 and September 8, 2026 respectively.

Scorecard3 real differences · 7 level
Flex AI Workout Trainer & Log versus Train With Soph: the parameters behind the verdict, then further details
ParameterFlex AI Workout Trainer & LogTrain With Soph
PriceFreeFree
Rating4.6 (2.4K ratings) — better4.5 (6 ratings)
Positive reviews69.3% of reviews — better62.5% of reviews
Number of ratings2.4K — better6
Update frequencyEvery 9 days — betterEvery 4 months
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFree with in-app purchases
DevicesiPhone, Apple WatchiPhone, iPod
Requires iOS18.015.1 — better
Further details — not scored
Size574 MB20 MB
Age rating17+4+
DeveloperFlex Artificial Intelligence Inc.Sophie Allen Empire Pty Ltd

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%

Train With Soph

All ratings6 ratings
Positive83.3%
Neutral0.0%
Negative16.7%
Written reviews8 reviews
Positive62.5%
Neutral0.0%
Negative37.5%

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

Train With Soph

Not enough reviews yet to summarise bugs or requests.

In-app purchases

8 purchases

Flex AI Workout Trainer & Log

Subscriptions6
  • Premium Subscription Monthly$1.991 Month
  • Premium Plus Monthly$2.991 Month
  • Premium Yearly Subscription$9.991 Year
Show 3 more
  • Premium Plus Family Monthly$9.991 Month
  • Premium Plus Yearly7 Days trial$19.991 Year
  • Premium Plus Family Yearly7 Days trial$49.991 Year
One-time2
  • 1 Month Free PremiumFree
  • Lifetime Free PremiumFree
1 purchases

Train With Soph

One-time1
  • Become a TWS member today$54.99

Questions

Is Flex AI Workout Trainer & Log free?
Flex AI Workout Trainer & Log is free to download, with in-app purchases available.
Is Train With Soph free?
Train With Soph is free to download, with in-app purchases available.
Which has better reviews, Flex AI Workout Trainer & Log or Train With Soph?
Flex AI Workout Trainer & Log is rated higher. Flex AI Workout Trainer & Log averages 4.6 out of 5 from 2.4K ratings, while Train With Soph averages 4.5 from 6 ratings.
Do Flex AI Workout Trainer & Log or Train With Soph have ads?
Neither Flex AI Workout Trainer & Log nor Train With Soph shows ads.
Which is updated more often, Flex AI Workout Trainer & Log or Train With Soph?
Flex AI Workout Trainer & Log ships an update every 9 days, and Train With Soph every 4 months. Most recently, Flex AI Workout Trainer & Log was updated on September 26, 2026 and Train With Soph on September 8, 2026.

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