Comparison

Nucleus Gym vs K WORKOUT | KSYNC

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

Head to head
About

Nucleus Gym

Easily manage your fitness journey by booking classes and checking your membership status directly from your device. Make reservations, join waitlists, and access your profile anytime, anywhere.

Highlights
  • Book classes
  • Manage reservations
  • Join waitlists
  • Check profile
  • View membership status
Features
Read full description

Download the Nucleus Gym app to easily book classes and manage your fitness experience - anytime, anywhere. Make a reservation, get added to a wait list, check your profile and membership status, and more – all from your device. Visit https://www.nucleusgym.com/ to learn more.

About

K WORKOUT | KSYNC

Discover and save personalized fitness routines, track your progress, and access a vast library of exercises. Coaches can share workouts, manage clients, and monitor engagement. Includes nutrition scanning and music stations to enhance your fitness journey.

Highlights
  • Personalized workout builder
  • 3,000+ exercise library
  • Workout sharing via link/QR
  • Client management for coaches
  • Nutrition scanning and recommendations
  • 40,000+ music stations
  • Progress tracking and analytics
Features
Read full description

KWORKOUT makes fitness simple, shareable, and coachable. Discover workouts from creators and coaches, open them instantly by link or QR code, and save your favorites inside K WORKOUT. With KSYNC, coaches can share workouts, track engagement, and manage clients in one place. Fitness for everyone. Build your perfect routine in seconds. Choose your equipment and target muscles, or let our Certified Trainer GPT help design a plan for you. From first reps to PRs, no equipment to full gym setups, KWORKOUT adapts to your level. • 3,000+ exercises • Personalized workout workflow • Save favorite workouts • Progress tracking & analytics • Multi-language support KSYNC Coaching for creators and coaches. Turn shared workouts into real client relationships. Post a workout anywhere by link or QR code, let users complete it instantly, and manage client activity inside K WORKOUT. • Share workouts anywhere • Link and QR workout access • Track clicks, saves, and engagement • Manage clients privately • Build your coaching business inside the app Smarter nutrition. Scan barcodes, discover nutrition info instantly, and save your favorites. If something doesn’t fit your goals, K WORKOUT can suggest better-rated alternatives. • Save food favorites • Quick nutrition ratings • Smart recommendations Music that moves you. Dial in the vibe for lifting, cardio, or everyday life. Explore over 40,000 stations, filter by Top 100, and save your favorites for easy playback. • 40,000+ searchable music stations • Top 100 filters • Save favorites for quick access Whether you’re training on your own, following your favorite creator, or coaching clients through KSYNC, K WORKOUT gives you the tools to move, improve, and stay consistent.

Screenshots

Nucleus Gym4 screens
K WORKOUT | KSYNC4 screens

Verdict

The call

The clearest difference is update cadence: K WORKOUT | KSYNC at every 8 days against Nucleus Gym's every 9 months. K WORKOUT | KSYNC also leads on device support (4 vs 2). Nucleus Gym's advantage is iOS requirement (13.5 vs 15.0). On price, rating, ratings volume 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Nucleus Gym against 5.0 for K WORKOUT | KSYNC. Both are backed by a comparable volume of ratings — 2 and 2 respectively.

UpkeepUpdate frequency

Nucleus Gym ships an update every 9 months, K WORKOUT | KSYNC every 8 days. Both last shipped on October 10, 2026.

Scorecard3 real differences · 6 level
Nucleus Gym versus K WORKOUT | KSYNC: the parameters behind the verdict, then further details
ParameterNucleus GymK WORKOUT | KSYNC
PriceFreeFree
Rating5.0 (2 ratings)5.0 (2 ratings)
Number of ratings22
Update frequencyEvery 9 monthsEvery 8 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPodiPhone, iPad, iPod, Apple Watch — better
Requires iOS13.5 — better15.0
Further details — not scored
Size14 MB50 MB
Age rating4+4+
DeveloperNucleus Gym LLCKintsugi LLC

Customer experience

Nucleus Gym

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

K WORKOUT | KSYNC

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Nucleus Gym

No in-app purchases

None

K WORKOUT | KSYNC

No in-app purchases

Questions

Is Nucleus Gym free?
Nucleus Gym is free to download, with no in-app purchases.
Is K WORKOUT | KSYNC free?
K WORKOUT | KSYNC is free to download, with no in-app purchases.
Which has better reviews, Nucleus Gym or K WORKOUT | KSYNC?
Nucleus Gym and K WORKOUT | KSYNC are both rated 5.0 out of 5 on the App Store, from 2 and 2 ratings respectively.
Do Nucleus Gym or K WORKOUT | KSYNC have ads?
Neither Nucleus Gym nor K WORKOUT | KSYNC shows ads.
Which is updated more often, Nucleus Gym or K WORKOUT | KSYNC?
Nucleus Gym ships an update every 9 months, and K WORKOUT | KSYNC every 8 days. Most recently, Nucleus Gym was updated on October 10, 2026 and K WORKOUT | KSYNC on October 10, 2026.

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