# Nucleus Gym vs K WORKOUT | KSYNC

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.

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.

## The numbers

| Metric | Nucleus Gym | K WORKOUT | KSYNC |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/nucleus-gym/id6526486010/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/k-workout-ksync/id6752256796/reviews) |
| Number of ratings | 2 | 2 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 8 days** |
| Monetization | Free | Free |
| Size | 14 MB | 50 MB |
| Requires iOS | **13.5** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Nucleus Gym LLC](https://appshunter.io/developer/1756289121) | [Kintsugi LLC](https://appshunter.io/developer/1838476918) |

## What reviewers say

### Nucleus Gym

[App page](https://appshunter.io/ios/app/nucleus-gym/id6526486010)

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:** macOS Compatibility

**In-app purchases:** none


### K WORKOUT | KSYNC

[App page](https://appshunter.io/ios/app/k-workout-ksync/id6752256796)

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:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*