# K WORKOUT | KSYNC vs Carmona OS

The clearest difference is rating: K WORKOUT | KSYNC at 5.0 against Carmona OS's 4.2. K WORKOUT | KSYNC also leads on in-app purchases (none vs 2). Carmona OS's advantage is update cadence (every 2 days vs every 8 days). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. Carmona OS sells 2 in-app purchases, starting at $14.99 per month. K WORKOUT | KSYNC asks for nothing beyond the download.

K WORKOUT | KSYNC holds the better App Store score, 5.0 against 4.2. Both are backed by a comparable volume of ratings — 2 and 5 respectively.

K WORKOUT | KSYNC ships an update every 8 days, Carmona OS every 2 days. The most recent releases landed on October 30, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | K WORKOUT | KSYNC | Carmona OS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/k-workout-ksync/id6752256796/reviews)** | [4.2 (5 ratings)](https://appshunter.io/ios/app/carmona-os/id6759835736/reviews) |
| Number of ratings | 2 | **5** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 8 days | **Every 2 days** |
| Monetization | **Free** | Freemium |
| Size | 50 MB | 41 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Kintsugi LLC](https://appshunter.io/developer/1838476918) | [Matthew Carmona](https://appshunter.io/developer/1881080098) |

## What reviewers say

### 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


### Carmona OS

[App page](https://appshunter.io/ios/app/carmona-os/id6759835736)

This app provides adaptive training programs for lifters, offering structured workouts with personalized weight recommendations based on your performance. It includes different training splits and session lengths, with nutrition guidance to support your fitness goals.

**Highlights:** Adaptive training programs, Personalized weight recommendations, Multiple training splits (Precision, Essentials), Adjustable session lengths (full, 45 Min), Workout progress tracking, Nutrition guidance and playbooks

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Carmona OS Premium | $14.99 | per month |
| Carmona OS Premium | $119.99 | per year |


## Frequently asked questions

### Is K WORKOUT | KSYNC free?

K WORKOUT | KSYNC is free to download, with no in-app purchases.

### Is Carmona OS free?

Carmona OS is free to download, with in-app purchases available.

### Which has better reviews, K WORKOUT | KSYNC or Carmona OS?

K WORKOUT | KSYNC is rated higher. K WORKOUT | KSYNC averages 5.0 out of 5 from 2 ratings, while Carmona OS averages 4.2 from 5 ratings.

### Do K WORKOUT | KSYNC or Carmona OS have ads?

Neither K WORKOUT | KSYNC nor Carmona OS shows ads.

### Which is updated more often, K WORKOUT | KSYNC or Carmona OS?

K WORKOUT | KSYNC ships an update every 8 days, and Carmona OS every 2 days. Most recently, K WORKOUT | KSYNC was updated on October 30, 2026 and Carmona OS on November 5, 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.*