Comparison

Flex AI Workout Trainer & Log vs Lets Get Fit

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

Lets Get Fit

Features
Read full description

Your All-in-One Home Fitness & Nutrition App Join thousands of women transforming their health from home with workouts, nutrition and simple tools that help you get real results. Whether your goal is to lose weight, build strength, tone up or simply feel healthier, Let's Get Fit gives you everything you need in one place. 1,000+ Real-Time Workouts Choose from over 1,000 professionally guided workouts including strength training, HIIT, Pilates, boxing, low impact, mobility and more. With workouts from just 15 minutes to 60 minutes, there's something for every fitness level. Weekly Workout Plans Never wonder what workout to do next. Every week Charlotte creates a brand-new Monday–Sunday workout schedule, taking the guesswork out of your fitness journey and helping you stay consistent. Healthy Recipes Discover delicious, high-protein recipes with full calorie and macro information to help you fuel your body and stay on track. Calorie Calculator Not sure how much you should be eating? Our built-in calorie calculator works out your personalised daily calorie target based on your goals, whether you're looking to lose weight, maintain or build muscle. Food Tracker Quickly log your meals, monitor your calorie intake and track your daily progress with our simple food diary and progress tracker. Track Your Progress Monitor your workouts, nutrition and progress over time so you can celebrate every milestone and stay motivated. A Supportive Community You're never doing it alone. Join our private community where hundreds of women motivate, encourage and support each other every step of the way. Designed by Charlotte Thorne Charlotte has helped thousands of women build healthier, stronger lifestyles through realistic home workouts that fit around busy lives. Start today with a 7-day free trial and discover why so many women choose Let's Get Fit as their daily fitness companion. Please note that the LGF app is a subscription based service with a 7 day free trial when you first sign up. Terms of Use: https://letsgetfit.com/terms Privacy Policy: https://letsgetfit.com/privacy

Screenshots

Flex AI Workout Trainer & Log4 screens
Lets Get Fit3 screens

Verdict

The call

The clearest difference is iOS requirement: Lets Get Fit at 15.6 against Flex AI Workout Trainer & Log's 18.0. On price, update cadence, ads and in-app purchases 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 Lets Get Fit sells 2 in-app purchases, starting at $14.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Flex AI Workout Trainer & Log ships an update every 9 days, Lets Get Fit every 8 days. The most recent releases landed on October 22, 2026 and October 20, 2026 respectively.

Scorecard1 real difference · 9 level
Flex AI Workout Trainer & Log versus Lets Get Fit: the parameters behind the verdict, then further details
ParameterFlex AI Workout Trainer & LogLets Get Fit
PriceFreeFree
Rating4.6 (2.4K ratings) — better—
Positive reviews69.0% of reviews—
Number of ratings2.4K — better—
Update frequencyEvery 9 daysEvery 8 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFreemium—
DevicesiPhone, Apple WatchiPhone, iPod
Requires iOS18.015.6 — better
Further details — not scored
Size574 MB84 MB
Age rating17+4+
DeveloperFlex Artificial Intelligence Inc.CT Fitness LTD

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

Lets Get Fit

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
2 purchases

Lets Get Fit

Subscriptions2
  • Monthly Membership7 Days trial$14.991 Month
  • Annual Membership7 Days trial$99.991 Year

Questions

Is Flex AI Workout Trainer & Log free?
Flex AI Workout Trainer & Log is free to download, with in-app purchases available.
Is Lets Get Fit free?
Lets Get Fit is free to download, with in-app purchases available.
Do Flex AI Workout Trainer & Log or Lets Get Fit have ads?
Neither Flex AI Workout Trainer & Log nor Lets Get Fit shows ads.
Which is updated more often, Flex AI Workout Trainer & Log or Lets Get Fit?
Flex AI Workout Trainer & Log ships an update every 9 days, and Lets Get Fit every 8 days. Most recently, Flex AI Workout Trainer & Log was updated on October 22, 2026 and Lets Get Fit on October 20, 2026.

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