# KBuddy 9 vs Zystem.One

The clearest difference is rating: Zystem.One at 5.0 against KBuddy 9's 4.5. Zystem.One also leads on in-app purchases (none vs 12) and review sentiment (100% vs 92%). KBuddy 9's advantage is device support (4 vs 2). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. KBuddy 9 sells 12 in-app purchases, starting at $0.99 per 7 days. Zystem.One asks for nothing beyond the download.

Zystem.One holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 2 and 2 respectively. Written reviews point the same way: 92% of KBuddy 9's written reviews are positive against 100% of Zystem.One's.

KBuddy 9 ships an update every 3 weeks, Zystem.One monthly. Both last shipped on October 24, 2026.

## The numbers

| Metric | KBuddy 9 | Zystem.One |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (2 ratings)](https://appshunter.io/ios/app/kbuddy-9/id1630537751/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/zystemone/id6768262331/reviews)** |
| Number of ratings | 2 | 2 |
| Positive reviews | 92.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Monthly |
| Monetization | Free with in-app purchases | **Free** |
| Size | 73 MB | 144 MB |
| Requires iOS | 18.0 | **15.5** |
| Devices | **iPhone, iPad, Apple Watch, Vision Pro** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Oleg Mueller](https://appshunter.io/developer/367875607) | [nutrilize GmbH](https://appshunter.io/developer/1521442832) |

## What reviewers say

### KBuddy 9

[App page](https://appshunter.io/ios/app/kbuddy-9/id1630537751)

This digital workout companion helps manage and execute personalized training plans. It offers precise timers, automatic weight adjustments, and progress tracking. Seamlessly syncs across Apple devices and integrates with Apple Health.

**Highlights:** Unlimited training plan creation, Precise workout timer, Automatic weight adjustments, Apple Watch integration, Detailed statistics and muscle overviews, PDF export of progress, Apple Health integration

**Features:** macOS Compatibility, Family Sharing, Apple Watch app

**In-app purchases (12)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Pro - Weekly | $0.99 | per 7 days |
| Unlock Pro - Weekly - Family | $1.99 | per 7 days |
| Unlock Pro - Monthly | $1.99 | per month |
| Unlock Pro - Monthly - Family | $2.99 | per month |
| Unlock Pro - Yearly | $17.99 | per year |
| Unlock Pro - Yearly - Family | $24.99 | per year |
| Small Tip | $1.99 | one-time |
| Medium Tip | $3.99 | one-time |
| Big Tip | $9.99 | one-time |
| Very Big Tip | $24.99 | one-time |
| Unlock Pro | $49.99 | one-time |
| Unlock Pro - Family | $89.99 | one-time |


### Zystem.One

[App page](https://appshunter.io/ios/app/zystemone/id6768262331)

This app provides personalized online coaching for a healthier lifestyle. It includes features for food tracking, custom meal plans, workout routines, progress monitoring, and direct chat with your coach. It also syncs with Apple Health to help you achieve your wellness goals.

**Highlights:** Food tracking and recipes, Individual nutrition plans, Workout plans and tracking, Progress monitoring, Apple Health synchronization, Direct coach chat

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

**In-app purchases:** none


## Frequently asked questions

### Is KBuddy 9 free?

KBuddy 9 is free to download, with in-app purchases available.

### Is Zystem.One free?

Zystem.One is free to download, with no in-app purchases.

### Which has better reviews, KBuddy 9 or Zystem.One?

Zystem.One is rated higher. KBuddy 9 averages 4.5 out of 5 from 2 ratings, while Zystem.One averages 5.0 from 2 ratings.

### Do KBuddy 9 or Zystem.One have ads?

Neither KBuddy 9 nor Zystem.One shows ads.

### Which is updated more often, KBuddy 9 or Zystem.One?

KBuddy 9 ships an update every 3 weeks, and Zystem.One monthly. Most recently, KBuddy 9 was updated on October 24, 2026 and Zystem.One on October 24, 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.*