Nucleus Gym vs K WORKOUT | KSYNC
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Book classes
- Manage reservations
- Join waitlists
- Check profile
- View membership status
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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.
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.
- 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
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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
Verdict
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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
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.
Nucleus Gym ships an update every 9 months, K WORKOUT | KSYNC every 8 days. Both last shipped on October 10, 2026.
| Parameter | Nucleus Gym | K WORKOUT | KSYNC |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) | 5.0 (2 ratings) |
| Number of ratings | 2 | 2 |
| Update frequency | Every 9 months | Every 8 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod, Apple Watch — better |
| Requires iOS | 13.5 — better | 15.0 |
| Further details — not scored | ||
| Size | 14 MB | 50 MB |
| Age rating | 4+ | 4+ |
| Developer | Nucleus Gym LLC | Kintsugi LLC |
Customer experience
Nucleus Gym
K WORKOUT | KSYNC
In-app purchases
Nucleus Gym
No in-app purchases
K WORKOUT | KSYNC
No in-app purchases
Questions
Is Nucleus Gym free?
Is K WORKOUT | KSYNC free?
Which has better reviews, Nucleus Gym or K WORKOUT | KSYNC?
Do Nucleus Gym or K WORKOUT | KSYNC have ads?
Which is updated more often, Nucleus Gym or K WORKOUT | KSYNC?
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