Comparison

Workout Trainer AI vs KAI Skin

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

Head to head
About

Workout Trainer AI

Achieve your fitness goals with AI-powered personalized coaching. Access multimedia workouts, track various sports, log weightlifting, and connect with a supportive community. Enhance your training with advanced heart rate feedback and performance analysis.

Highlights
  • AI personalized weekly plans
  • Multimedia workouts for all levels
  • 70+ sports activities tracking
  • Weightlifting logging tools
  • GPS distance tracking
  • Heart rate feedback & analysis
  • Community leaderboards
Features
Read full description

Hit your fitness goals anywhere with Workout Trainer. Powered by AI and expert-led, follow along to your personalized weekly plans including multimedia workouts for every fitness level. With thousands of bodyweight and rep-based workouts, 70+ sports activities, GPS distance tracking, and weightlifting logging tools, it’s like having a personal trainer in your pocket. Join our active community—start your fitness journey or link up with our fitness fanatics and compete on the leaderboard! Advanced Heart Rate Feedback & Performance Analysis Connect your Apple Watch or bluetooth LE heart rate monitor for the best experience. Get instant heart rate feedback during your workouts. Log details like reps done and weights used. Check out your heart rate graphs and summary zones. Compare & analyze your performance to really make your breakthrough! ***** This probably means you want to get started right away. We won't stop you—Download Workout Trainer AI and start crushing your fitness goals today! ***** ---------------------------------------------------------------------------------------------------------------- Are you a fitness professional? Sign up to get free access to our innovative training tools and coaching solutions. ---------------------------------------------------------------------------------------------------------------- Workout Trainer uses HealthKit to export your Workout Trainer workouts to Apple's Health app and to read heart rate and biometric data. Optional: Unlock the full experience with a PRO+ membership! Bonus: new subscribers can enjoy a risk-free 2-week trial period. After the trial, your iTunes Account will be billed $9.99 per month. This auto-renewing subscription gives you access to many premium features including AI weekly plans and 1:1 AI trainer chat, as well as 100+ training programs developed by our certified personal trainers. This subscription will automatically renew within 24-hours prior to the end of each billing period and may be managed by going to your iTunes Account Settings after purchase. Privacy Policy: https://www.skimble.com/privacy Terms of Service: https://www.skimble.com/terms

About

KAI Skin

Features
Read full description

KAI Skin helps you understand your skin and build a routine you can stick to. Take a photo to get an AI-powered skin score and insights, choose what you want to focus on, then generate a personalized morning and evening routine. Terms of Service: https://sites.google.com/view/kaiskin/privacy?#h.vcr6nf8mev05 Privacy Policy: https://sites.google.com/view/kaiskin/privacy?authuser=0

Screenshots

Workout Trainer AI4 screens
KAI Skin4 screens

Verdict

The call

The clearest difference is ads: KAI Skin at none against Workout Trainer AI's shown. Workout Trainer AI's advantage is update cadence (monthly vs every 5 months) and device support (3 vs 1). On price, in-app purchases and iOS requirement 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. Workout Trainer AI sells 10 in-app purchases, starting at $6.99 per month and KAI Skin sells 2 in-app purchases, starting at $12.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Workout Trainer AI ships an update monthly, KAI Skin every 5 months. The most recent releases landed on November 5, 2026 and October 30, 2026 respectively.

Scorecard3 real differences · 7 level
Workout Trainer AI versus KAI Skin: the parameters behind the verdict, then further details
ParameterWorkout Trainer AIKAI Skin
PriceFreeFree
Rating4.7 (7.7K ratings) — better—
Positive reviews87.8% of reviews—
Number of ratings7.7K — better—
Update frequencyMonthly — betterEvery 5 months
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, Apple Watch — betteriPhone
Requires iOS16.616.6
Further details — not scored
Size150 MB16 MB
Age rating9+4+
DeveloperSkimbleALI ATAEI FARD

Bugs and requests

Workout Trainer AI

Reported bugs

3 issues
  • App crashes and freezes
  • Workouts not loading or saving properly
  • Paid subscription not granting full access

Requested features

4 requests
  • Ability to download workouts for offline use
  • More advanced workout tracking and analytics
  • Integration with other fitness apps and devices
  • Customizable voice guidance and music options

KAI Skin

Not enough reviews yet to summarise bugs or requests.

In-app purchases

10 purchases

Workout Trainer AI

Subscriptions3
  • PRO+ Monthly Subscription7 Days trial$6.991 Month
  • Monthly PRO+14 Days trial$9.991 Month
  • Annual PRO+7 Days trial$59.991 Year
One-time7
  • 3 Months PRO Access (60% off!!!)$9.99
  • 6 Pack Toned Abs$9.99
  • Slim & Trim Bootcamp$9.99
Show 4 more
  • Lose It. Tone It!$9.99
  • Bikini Beach Babe$9.99
  • 1 Year PRO Access (60% off!!!)$19.99
  • 1 Year Membership of PRO+$59.99
2 purchases

KAI Skin

Subscriptions2
  • Premium Monthly$12.991 Month
  • Premium Yearly$39.991 Year

Questions

Is Workout Trainer AI free?
Workout Trainer AI is free to download, with in-app purchases available.
Is KAI Skin free?
KAI Skin is free to download, with in-app purchases available.
Do Workout Trainer AI or KAI Skin have ads?
Workout Trainer AI shows ads; KAI Skin does not.
Which is updated more often, Workout Trainer AI or KAI Skin?
Workout Trainer AI ships an update monthly, and KAI Skin every 5 months. Most recently, Workout Trainer AI was updated on November 5, 2026 and KAI Skin on October 30, 2026.

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