Comparison

Flex AI Workout Trainer & Log vs Krilo

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

Krilo

Log meals by taking photos, and AI will identify your food, estimate calories, and track macros. Syncs with Apple Health for a complete picture of your daily intake and activity. Plan meals and generate grocery lists easily.

Highlights
  • AI photo food recognition
  • Barcode scanner
  • Manual food entry
  • Macro tracking with visual rings
  • Personalized calorie targets
  • Apple Health integration
  • Apple Watch app
Features
Read full description

Track calories and macros with AI food logging, meal planning, and Apple Health integration. Krilo makes food logging fast. Snap a photo of your meal and AI identifies foods and estimates calories, protein, carbs, and fat. Review the results, adjust portions, and save. Connect Apple Health and use the Apple Watch companion to keep your nutrition and activity close at hand. Spend less time entering food and more time understanding your day. STOP TYPING, START SNAPPING • AI photo recognition — snap a meal and get estimated calories, protein, carbs, and fat • Barcode scanner for packaged foods • Manual entry when you want full control • Save go-to meals as Favorites for quick repeat logging SEE YOUR WHOLE DAY AT A GLANCE • A colorful macro ring shows how protein, carbs, and fat contribute to your calorie intake • See your macro totals alongside your daily goals • Personalized calorie and macro targets calculated from your stats • Review your food history and nutrition trends over time • See how your food intake, activity, and wellness trends fit together NUTRITION AND ACTIVITY — IN ONE APP With your permission, Krilo reads supported Apple Health data so you can review nutrition, active energy, workouts, and wellness trends together. BUILT FOR APPLE WATCH • Log favorites and recent meals from your wrist • Check remaining calories and your daily macro summary • See remaining calories at a glance with an Apple Watch complication • Review workouts recorded with Apple Watch in Krilo on your iPhone through Apple Health FROM MEAL PLAN TO GROCERY LIST Plan your meals with AI assistance, then turn your plan into a grocery list. Krilo can break meals down into individual ingredients and provide Kroger and Walmart search links, helping you move from planning to shopping. DESIGNED TO STAY OUT OF YOUR WAY Sign in with Apple or use your email. Your food log is stored on your device first and syncs securely when you're signed in and connected. Krilo is not ad-supported. Whether you're tracking macros, planning meals, or reviewing your activity, Krilo brings your daily nutrition and fitness information together in one place. SUBSCRIPTION AND AI FEATURES AI-powered features require a subscription and are available only to users age 18 and older. Free trials, when offered, are available to eligible new subscribers. After the trial, your subscription automatically renews at the displayed price unless canceled. Manage or cancel your subscription in your Apple Account settings. Spend less time logging and more time understanding your health. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Krilo Terms & Conditions: https://krilohealth.com/terms Privacy Policy: https://krilohealth.com/privacy

Screenshots

Flex AI Workout Trainer & Log4 screens
Krilo4 screens

Verdict

The call

The clearest difference is rating: Krilo at 5.0 against Flex AI Workout Trainer & Log's 4.6. Flex AI Workout Trainer & Log's advantage is ratings volume (2.4K vs 2) and iOS requirement (18.0 vs 26.0). 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 Krilo sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Krilo 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 2, so its average is the more settled of the two.

UpkeepUpdate frequency

Flex AI Workout Trainer & Log ships an update every 9 days, Krilo every 11 days. The most recent releases landed on October 24, 2026 and October 1, 2026 respectively.

Scorecard3 real differences · 7 level
Flex AI Workout Trainer & Log versus Krilo: the parameters behind the verdict, then further details
ParameterFlex AI Workout Trainer & LogKrilo
PriceFreeFree
Rating4.6 (2.4K ratings)5.0 (2 ratings) — better
Positive reviews69.0% of reviews—
Number of ratings2.4K — better2
Update frequencyEvery 9 days — betterEvery 11 days
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFree with in-app purchases
DevicesiPhone, Apple WatchiPhone, iPad, Apple Watch — better
Requires iOS18.0 — better26.0
Further details — not scored
Size574 MB12 MB
Age rating17+12+
DeveloperFlex Artificial Intelligence Inc.Nicholas Gittings

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%

Krilo

All ratings2 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

Krilo

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

Krilo

Subscriptions2
  • Krilo Premium Monthly7 Days trial$4.991 Month
  • Krilo Premium7 Days trial$49.991 Year

Questions

Is Flex AI Workout Trainer & Log free?
Flex AI Workout Trainer & Log is free to download, with in-app purchases available.
Is Krilo free?
Krilo is free to download, with in-app purchases available.
Which has better reviews, Flex AI Workout Trainer & Log or Krilo?
Krilo is rated higher. Flex AI Workout Trainer & Log averages 4.6 out of 5 from 2.4K ratings, while Krilo averages 5.0 from 2 ratings.
Do Flex AI Workout Trainer & Log or Krilo have ads?
Neither Flex AI Workout Trainer & Log nor Krilo shows ads.
Which is updated more often, Flex AI Workout Trainer & Log or Krilo?
Flex AI Workout Trainer & Log ships an update every 9 days, and Krilo every 11 days. Most recently, Flex AI Workout Trainer & Log was updated on October 24, 2026 and Krilo on October 1, 2026.

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